Variables: a CSV header that names one variable twice is refused

dataset.import read two header cells that named one variable (City
and City, or Shown and #Shown) into the same column, so each row kept
only the last non-blank cell and the other value was dropped without a
word. The import is now refused with the two column numbers, and the
message has a row in every complete-message catalog.

crates/engine/src/cmd/variablecmds.rs

@@ -731,7 +731,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Import Data Sets…",
             ["Window", "Variables"],
             None,
-            "{path? | data? | dataBase64? | csv?} load datasets from CSV, comma- or tab-separated (header: name, then variable names; one row per dataset; without the name column every header is a variable and the rows take the first free names Data Set 1, 2…). A header that names no variable defines one, unbound: `#Name` defines a visibility variable, `@Name` defines an image variable, and a header without a prefix defines a text variable. A prefixed header whose name is a variable of another kind, and a `%` header that isn't a variable's exact name (graph data files), are refused, and so is a header that would define a variable while the variables are locked. Rows whose name already exists are replaced → {imported, updated, names, defined}",
+            "{path? | data? | dataBase64? | csv?} load datasets from CSV, comma- or tab-separated (header: name, then variable names; one row per dataset; without the name column every header is a variable and the rows take the first free names Data Set 1, 2…). A header that names no variable defines one, unbound: `#Name` defines a visibility variable, `@Name` defines an image variable, and a header without a prefix defines a text variable. A prefixed header whose name is a variable of another kind, and a `%` header that isn't a variable's exact name (graph data files), are refused, and so are two headers that name one variable and a header that would define a variable while the variables are locked. Rows whose name already exists are replaced → {imported, updated, names, defined}",
             has_doc,
             dataset_import
         ),

crates/engine/src/cmd/variablecmds/csv.rs

@@ -252,8 +252,8 @@ fn header_variable(
 /// names; the other headers name variables, as [`header_variable`] reads them, and the
 /// variables the document doesn't define yet are defined, unbound. Without the `name` column,
 /// every header names a variable and the rows take the first free names "Data Set 1", "Data
-/// Set 2" and so on. Existing rows of the same name are replaced; new names are appended. One
-/// undo step.
+/// Set 2" and so on. Two headers that name one variable are refused. Existing rows of the same
+/// name are replaced; new names are appended. One undo step.
 pub(super) fn dataset_import(s: &mut Session, p: &Value) -> Result<Value> {
     const C: &str = "dataset.import";
     let bytes = datasets_csv_bytes(p, C)?;
@@ -277,6 +277,10 @@ pub(super) fn dataset_import(s: &mut Session, p: &Value) -> Result<Value> {
             return Err(bad(C, format!("empty header in column {}", i + 1)));
         }
         let (name, kind) = header_variable(cell, i + 1, &kinds, &mut defined, C)?;
+        if let Some(&(first, ..)) = columns.iter().find(|(_, n, _)| *n == name) {
+            let (first, column) = (first + 1, i + 1);
+            return Err(bad(C, format!("columns {first} and {column} both name the variable `{name}`")));
+        }
         columns.push((i, name, kind));
     }
     // Lock Variables refuses New Variable, so the import is refused when a header would define one.

crates/engine/src/tests/variables.rs

@@ -1519,6 +1519,28 @@ fn datasets_csv_refuses_graph_data_file_columns() {
     assert!(vars.variables.is_empty() && vars.datasets.is_empty());
 }
 
+/// Two header cells that name one variable, by the same name or by a name and its prefix, are
+/// refused with both columns, and the import changes nothing.
+#[test]
+fn datasets_csv_refuses_two_columns_for_one_variable() {
+    let mut s = session();
+    s.execute("variable.define", &json!({"name": "Shown", "kind": "visibility"})).unwrap();
+    let error = |s: &mut Session, csv: &str| s.execute("dataset.import", &json!({"csv": csv})).unwrap_err().to_string();
+    for (csv, first, second, var) in [
+        ("name,City,City\nR,Paris,Rome", 2, 3, "City"),
+        ("name,City,City\nR,Paris,", 2, 3, "City"),
+        ("City,Title,City\nParis,x,Rome", 1, 3, "City"),
+        ("name,Shown,#Shown\nR,true,false", 2, 3, "Shown"),
+        ("Title\t@Photo\t@ Photo\nx\ta.png\tb.png", 2, 3, "Photo"),
+    ] {
+        let err = error(&mut s, csv);
+        assert!(err.contains(&format!("columns {first} and {second} both name the variable `{var}`")), "{csv}: {err}");
+    }
+    let vars = &s.doc().unwrap().doc.variables;
+    assert_eq!(vars.variables.len(), 1);
+    assert!(vars.datasets.is_empty());
+}
+
 /// While the variables are locked, an import is refused when a header cell would define a
 /// variable, as New Variable is, and a file whose headers all name variables imports.
 #[test]

crates/ui-egui/src/i18n/ca.tsv

@@ -5248,6 +5248,7 @@ digits	Malayalam	Malaiàlam
 @msg	not found	no s’ha trobat
 @msg	not in pattern editing mode	no esteu en mode d’edició de motius
 @msg	finish editing the pattern first	acabeu primer l’edició del motiu
+@msg	columns {first} and {column} both name the variable `{name}`	les columnes {first} i {column} anomenen totes dues la variable `{name}`
 @msg	nothing encoded	no s’ha codificat res
 @msg	nothing in data set {name} was applied: no object is bound to a variable it has a value for	no s’ha aplicat res del conjunt de dades {name}: cap objecte està vinculat a una variable per a la qual tingui un valor
 @msg	nothing selected	no hi ha res seleccionat

crates/ui-egui/src/i18n/cs.tsv

@@ -5473,6 +5473,7 @@ mark-style	Japanese	Japonské
 @msg	Batch: {count} processed, {failed} failed	Dávka: zpracováno {count}, selhalo {failed}
 @msg	choose a destination folder	vyberte cílovou složku
 @msg	choose a source folder	vyberte zdrojovou složku
+@msg	columns {first} and {column} both name the variable `{name}`	sloupce {first} a {column} uvádějí stejnou proměnnou `{name}`
 @msg	open a document with data sets	otevřete dokument se sadami dat
 @msg	nothing in data set {name} was applied: no object is bound to a variable it has a value for	ze sady dat {name} se nic nepoužilo: žádný objekt není svázán s proměnnou, pro kterou má hodnotu
 @msg	the action has no steps	akce nemá žádné kroky

crates/ui-egui/src/i18n/de.tsv

@@ -5050,6 +5050,7 @@ effect	Soft	Weich
 @msg	Batch: {count} processed, {failed} failed	Stapelverarbeitung: {count} verarbeitet, {failed} fehlgeschlagen
 @msg	choose a destination folder	wählen Sie einen Zielordner
 @msg	choose a source folder	wählen Sie einen Quellordner
+@msg	columns {first} and {column} both name the variable `{name}`	die Spalten {first} und {column} nennen beide die Variable `{name}`
 @msg	open a document with data sets	öffnen Sie ein Dokument mit Datensätzen
 @msg	nothing in data set {name} was applied: no object is bound to a variable it has a value for	aus dem Datensatz {name} wurde nichts angewendet: kein Objekt ist an eine Variable gebunden, für die er einen Wert hat
 @msg	the action has no steps	die Aktion hat keine Schritte

crates/ui-egui/src/i18n/el.tsv

@@ -5404,6 +5404,7 @@ effect	Points	Σημεία
 @msg	`{key}` must be an array of these names: {_1}	το `{key}` πρέπει να είναι πίνακας με αυτά τα ονόματα: {_1}
 @msg	choose a destination folder	επιλέξτε φάκελο προορισμού
 @msg	choose a source folder	επιλέξτε φάκελο προέλευσης
+@msg	columns {first} and {column} both name the variable `{name}`	οι στήλες {first} και {column} ονομάζουν και οι δύο τη μεταβλητή `{name}`
 @msg	open a document with data sets	ανοίξτε ένα έγγραφο με σύνολα δεδομένων
 @msg	nothing in data set {name} was applied: no object is bound to a variable it has a value for	δεν εφαρμόστηκε τίποτα από το σύνολο δεδομένων {name}: κανένα αντικείμενο δεν είναι συνδεδεμένο με μεταβλητή για την οποία έχει τιμή
 @msg	select an Intertwine group	επιλέξτε μια ομάδα διαπλοκής

crates/ui-egui/src/i18n/es.tsv

@@ -5414,6 +5414,7 @@ mark-style	Japanese	Japonesas
 @msg	Batch: {count} processed, {failed} failed	Lote: {count} procesados, {failed} con error
 @msg	choose a destination folder	elija una carpeta de destino
 @msg	choose a source folder	elija una carpeta de origen
+@msg	columns {first} and {column} both name the variable `{name}`	las columnas {first} y {column} nombran la misma variable `{name}`
 @msg	open a document with data sets	abra un documento con conjuntos de datos
 @msg	nothing in data set {name} was applied: no object is bound to a variable it has a value for	no se aplicó nada del conjunto de datos {name}: ningún objeto está vinculado a una variable para la que tenga un valor
 @msg	the action has no steps	la acción no tiene pasos

crates/ui-egui/src/i18n/fi.tsv

@@ -5416,6 +5416,7 @@ mark-style	Japanese	Japanilainen
 @msg	`{key}` must be an array of these names: {_1}	`{key}`-arvon on oltava taulukko, jossa on näitä nimiä: {_1}
 @msg	choose a destination folder	valitse kohdekansio
 @msg	choose a source folder	valitse lähdekansio
+@msg	columns {first} and {column} both name the variable `{name}`	sarakkeet {first} ja {column} nimeävät molemmat muuttujan `{name}`
 @msg	open a document with data sets	avaa asiakirja, jossa on tietojoukkoja
 @msg	nothing in data set {name} was applied: no object is bound to a variable it has a value for	tietojoukosta {name} ei käytetty mitään: mitään objektia ei ole sidottu muuttujaan, jolle siinä on arvo
 @msg	select an Intertwine group	valitse lomitusryhmä

crates/ui-egui/src/i18n/fr.tsv

@@ -5470,6 +5470,7 @@ theme	Appearance	Apparence
 @msg	Batch: {count} processed, {failed} failed	Traitement par lots : {count} traités, {failed} en échec
 @msg	choose a destination folder	choisissez un dossier de destination
 @msg	choose a source folder	choisissez un dossier source
+@msg	columns {first} and {column} both name the variable `{name}`	les colonnes {first} et {column} nomment toutes deux la variable `{name}`
 @msg	open a document with data sets	ouvrez un document avec des jeux de données
 @msg	nothing in data set {name} was applied: no object is bound to a variable it has a value for	rien du jeu de données {name} n’a été appliqué, car aucun objet n’est lié à une variable pour laquelle il a une valeur
 @msg	the action has no steps	l'action n'a aucune étape

crates/ui-egui/src/i18n/hu.tsv

@@ -5458,6 +5458,7 @@ imageTrace	Outline	Körvonal
 @msg	Batch: {count} processed, {failed} failed	Kötegelt feldolgozás: {count} feldolgozva, {failed} sikertelen
 @msg	choose a destination folder	válasszon célmappát
 @msg	choose a source folder	válasszon forrásmappát
+@msg	columns {first} and {column} both name the variable `{name}`	a(z) {first}. és a(z) {column}. oszlop ugyanazt a változót nevezi meg: `{name}`
 @msg	open a document with data sets	nyisson meg egy adatkészleteket tartalmazó dokumentumot
 @msg	nothing in data set {name} was applied: no object is bound to a variable it has a value for	ebből az adatkészletből semmi sem lett alkalmazva: {name}; egyetlen objektum sincs olyan változóhoz kötve, amelynek értéke van benne
 @msg	the action has no steps	a műveletnek nincsenek lépései

crates/ui-egui/src/i18n/it.tsv

@@ -5085,6 +5085,7 @@ lighting	Light	Luce
 @msg	Batch: {count} processed, {failed} failed	Elaborazione batch: {count} elaborati, {failed} non riusciti
 @msg	choose a destination folder	scegli una cartella di destinazione
 @msg	choose a source folder	scegli una cartella di origine
+@msg	columns {first} and {column} both name the variable `{name}`	le colonne {first} e {column} indicano entrambe la variabile `{name}`
 @msg	open a document with data sets	apri un documento con set di dati
 @msg	nothing in data set {name} was applied: no object is bound to a variable it has a value for	non è stato applicato nulla del set di dati {name}: nessun oggetto è associato a una variabile per cui ha un valore
 @msg	the action has no steps	l'azione non ha passaggi

crates/ui-egui/src/i18n/ja.tsv

@@ -5130,6 +5130,7 @@ lighting	Light	ライト
 @msg	Batch: {count} processed, {failed} failed	バッチ: {count} 件を処理、{failed} 件が失敗しました
 @msg	choose a destination folder	出力先フォルダーを選択してください
 @msg	choose a source folder	ソースフォルダーを選択してください
+@msg	columns {first} and {column} both name the variable `{name}`	列 {first} と列 {column} が同じ変数 `{name}` を指定しています
 @msg	open a document with data sets	データセットのあるドキュメントを開いてください
 @msg	nothing in data set {name} was applied: no object is bound to a variable it has a value for	データセット {name} から何も適用されませんでした: 値のある変数にバインドされたオブジェクトがありません
 @msg	the action has no steps	アクションにステップがありません

crates/ui-egui/src/i18n/ka.tsv

@@ -5121,6 +5121,7 @@ imageTrace	Outline	კონტური
 @msg	Batch: {count} processed, {failed} failed	პაკეტური დამუშავება: დამუშავდა {count}, ვერ დამუშავდა {failed}
 @msg	choose a destination folder	აირჩიეთ დანიშნულების საქაღალდე
 @msg	choose a source folder	აირჩიეთ წყარო საქაღალდე
+@msg	columns {first} and {column} both name the variable `{name}`	სვეტები {first} და {column} ორივე ასახელებს ცვლადს `{name}`
 @msg	open a document with data sets	გახსენით დოკუმენტი მონაცემთა ნაკრებებით
 @msg	nothing in data set {name} was applied: no object is bound to a variable it has a value for	მონაცემთა ნაკრები {name}: არაფერი გამოყენებულა; არცერთი ობიექტი არ არის მიბმული ცვლადზე, რომელსაც მასში მნიშვნელობა აქვს
 @msg	the action has no steps	მოქმედებას ნაბიჯები არ აქვს

crates/ui-egui/src/i18n/ko.tsv

@@ -5048,6 +5048,7 @@ lighting	Light	광원
 @msg	Batch: {count} processed, {failed} failed	일괄 처리: {count}개 처리됨, {failed}개 실패
 @msg	choose a destination folder	대상 폴더를 선택하세요
 @msg	choose a source folder	소스 폴더를 선택하세요
+@msg	columns {first} and {column} both name the variable `{name}`	{first}열과 {column}열이 모두 같은 변수 `{name}`을(를) 가리킵니다
 @msg	open a document with data sets	데이터 세트가 있는 문서를 여세요
 @msg	nothing in data set {name} was applied: no object is bound to a variable it has a value for	데이터 세트 {name}에서 적용된 항목이 없습니다: 값이 있는 변수에 연결된 개체가 없습니다
 @msg	the action has no steps	액션에 단계가 없습니다

crates/ui-egui/src/i18n/pl.tsv

@@ -5325,6 +5325,7 @@ mark-style	Japanese	Japońskie
 @msg	Batch: {count} processed, {failed} failed	Przetwarzanie wsadowe: przetworzono {count}, niepowodzenia: {failed}
 @msg	choose a destination folder	wybierz folder docelowy
 @msg	choose a source folder	wybierz folder źródłowy
+@msg	columns {first} and {column} both name the variable `{name}`	kolumny {first} i {column} wskazują tę samą zmienną `{name}`
 @msg	open a document with data sets	otwórz dokument z zestawami danych
 @msg	nothing in data set {name} was applied: no object is bound to a variable it has a value for	z zestawu danych {name} nic nie zastosowano: żaden obiekt nie jest powiązany ze zmienną, dla której ma on wartość
 @msg	the action has no steps	operacja nie ma kroków

crates/ui-egui/src/i18n/pt-br.tsv

@@ -5347,6 +5347,7 @@ mark-style	Japanese	Japonesas
 @msg	Batch: {count} processed, {failed} failed	Lote: {count} processados, {failed} com falha
 @msg	choose a destination folder	escolha uma pasta de destino
 @msg	choose a source folder	escolha uma pasta de origem
+@msg	columns {first} and {column} both name the variable `{name}`	as colunas {first} e {column} nomeiam a mesma variável `{name}`
 @msg	open a document with data sets	abra um documento com conjuntos de dados
 @msg	nothing in data set {name} was applied: no object is bound to a variable it has a value for	nada do conjunto de dados {name} foi aplicado: nenhum objeto está vinculado a uma variável para a qual ele tem um valor
 @msg	the action has no steps	a ação não tem etapas

crates/ui-egui/src/i18n/ru.tsv

@@ -5080,6 +5080,7 @@ lighting	Light	Свет
 @msg	Batch: {count} processed, {failed} failed	Пакетная обработка: обработано {count}, с ошибкой {failed}
 @msg	choose a destination folder	выберите папку назначения
 @msg	choose a source folder	выберите исходную папку
+@msg	columns {first} and {column} both name the variable `{name}`	столбцы {first} и {column} указывают одну и ту же переменную `{name}`
 @msg	open a document with data sets	откройте документ с наборами данных
 @msg	nothing in data set {name} was applied: no object is bound to a variable it has a value for	из набора данных {name} ничего не применено: ни один объект не привязан к переменной, для которой в нём есть значение
 @msg	the action has no steps	в действии нет шагов

crates/ui-egui/src/i18n/sv.tsv

@@ -5408,6 +5408,7 @@ theme	Appearance	Utseende
 @msg	`{key}` must be an array of these names: {_1}	`{key}` måste vara en lista med dessa namn: {_1}
 @msg	choose a destination folder	välj en målmapp
 @msg	choose a source folder	välj en källmapp
+@msg	columns {first} and {column} both name the variable `{name}`	kolumnerna {first} och {column} anger båda variabeln `{name}`
 @msg	open a document with data sets	öppna ett dokument med datauppsättningar
 @msg	nothing in data set {name} was applied: no object is bound to a variable it has a value for	inget i datauppsättningen {name} användes: inget objekt är bundet till en variabel som den har ett värde för
 @msg	select an Intertwine group	markera en sammanflätningsgrupp

crates/ui-egui/src/i18n/tests.rs

@@ -1705,6 +1705,25 @@ fn blend_spine_param_errors_say_what_is_wrong() {
     assert!(matches!(&e, EngineError::BadParams { msg, .. } if msg == "select a blend or give `id`"), "{e}");
 }
 
+/// Import Data Sets' refusal of two header cells that name one variable is translated in every
+/// language that translates every message.
+#[test]
+fn dataset_import_repeated_column_error_is_translated() {
+    use serde_json::json;
+    use vectorcraft_engine::{EngineError, Session};
+    let mut s = Session::new();
+    s.execute("file.new", &json!({})).unwrap();
+    let e = s.execute("dataset.import", &json!({"csv": "name,City,City\nR,Paris,Rome"})).unwrap_err();
+    let want = "columns 2 and 3 both name the variable `City`";
+    assert!(matches!(&e, EngineError::BadParams { msg, .. } if msg == want), "{e}");
+    let e = e.to_string();
+    for code in COMPLETE_MESSAGES {
+        let lang = Lang::from_code(code).expect("registered");
+        let shown = message(lang, &e);
+        assert!(!shown.contains(want), "{code}: {shown}");
+    }
+}
+
 /// The errors of saving, renaming and deleting a tracing preset are translated in every language
 /// that translates every message.
 #[test]

crates/ui-egui/src/i18n/tr.tsv

@@ -5359,6 +5359,7 @@ theme	Appearance	Görünüm
 @msg	its zlib compression is damaged	zlib sıkıştırması hasarlı
 @msg	its Zstandard compression is damaged	Zstandard sıkıştırması hasarlı
 @msg	it decompresses to more than {_1} MB	açıldığında {_1} MB'tan fazla alan kaplıyor
+@msg	columns {first} and {column} both name the variable `{name}`	{first} ve {column} numaralı sütunların ikisi de `{name}` değişkenini adlandırıyor
 @msg	the file's variables and data sets weren't read (variables: {variables}, data sets: {data_sets}): the Variables panel doesn't list them	dosyanın değişkenleri ve veri kümeleri okunmadı (değişkenler: {variables}, veri kümeleri: {data_sets}): Değişkenler paneli bunları listelemiyor
 @msg	nothing in data set {name} was applied: no object is bound to a variable it has a value for	{name} veri kümesinden hiçbir şey uygulanmadı: değer içerdiği bir değişkene bağlı hiçbir nesne yok
 @msg	select an Objects on Path group	bir Yol Üzerindeki Nesneler grubu seçin

crates/ui-egui/src/i18n/uk.tsv

@@ -5065,6 +5065,7 @@ lighting	Light	Світло
 @msg	Batch: {count} processed, {failed} failed	Пакетна обробка: оброблено {count}, з помилкою {failed}
 @msg	choose a destination folder	виберіть папку призначення
 @msg	choose a source folder	виберіть вихідну папку
+@msg	columns {first} and {column} both name the variable `{name}`	стовпці {first} і {column} вказують одну й ту саму змінну `{name}`
 @msg	open a document with data sets	відкрийте документ із наборами даних
 @msg	nothing in data set {name} was applied: no object is bound to a variable it has a value for	з набору даних {name} нічого не застосовано: жоден об’єкт не прив’язано до змінної, для якої в ньому є значення
 @msg	the action has no steps	у дії немає кроків

crates/ui-egui/src/i18n/vi.tsv

@@ -5068,6 +5068,7 @@ theme	Appearance	Giao diện
 @msg	Batch: {count} processed, {failed} failed	Hàng loạt: đã xử lý {count}, lỗi {failed}
 @msg	choose a destination folder	hãy chọn thư mục đích
 @msg	choose a source folder	hãy chọn thư mục nguồn
+@msg	columns {first} and {column} both name the variable `{name}`	cột {first} và cột {column} cùng chỉ định biến số `{name}`
 @msg	open a document with data sets	hãy mở một tài liệu có tập dữ liệu
 @msg	nothing in data set {name} was applied: no object is bound to a variable it has a value for	không có gì trong tập dữ liệu {name} được áp dụng: không có đối tượng nào được gắn với biến số mà tập dữ liệu có giá trị
 @msg	the action has no steps	hành động không có bước nào

crates/ui-egui/src/i18n/zh-hans.tsv

@@ -4532,6 +4532,7 @@ imageTrace	Outline	轮廓
 @msg	Batch: {count} processed, {failed} failed	批处理：已处理 {count} 个，失败 {failed} 个
 @msg	choose a destination folder	请选择目标文件夹
 @msg	choose a source folder	请选择源文件夹
+@msg	columns {first} and {column} both name the variable `{name}`	第 {first} 列和第 {column} 列都指定了变量 `{name}`
 @msg	open a document with data sets	请打开包含数据集的文档
 @msg	nothing in data set {name} was applied: no object is bound to a variable it has a value for	数据集 {name} 未应用任何内容：没有对象绑定到该数据集中有值的变量
 @msg	the action has no steps	该动作没有步骤

crates/ui-egui/src/i18n/zh-hant.tsv

@@ -2448,6 +2448,7 @@ file-filter	Templates	範本
 @msg	Batch: {count} processed, {failed} failed	批次：已處理 {count} 個，失敗 {failed} 個
 @msg	choose a destination folder	請選擇目的地資料夾
 @msg	choose a source folder	請選擇來源資料夾
+@msg	columns {first} and {column} both name the variable `{name}`	第 {first} 欄和第 {column} 欄都指定了變數 `{name}`
 @msg	open a document with data sets	請開啟含有資料集的文件
 @msg	nothing in data set {name} was applied: no object is bound to a variable it has a value for	資料集 {name} 未套用任何內容：沒有物件綁定到該資料集中有值的變數
 @msg	the action has no steps	動作沒有步驟

docs/mcp.md

@@ -1648,7 +1648,8 @@ already walks Image Trace. Short agent entry points:
   rows. `#Shown` defines a visibility variable `Shown`, `@Photo` defines an image variable `Photo`, and a cell without
   a prefix defines a text variable. A prefixed cell whose name is already a variable of the prefix's kind names it;
   one whose name is a variable of another kind fails the import. A `%` cell that isn't a variable's exact name (graph
-  data files) is refused. The reply's `defined` lists the variables the import defined. While the variables are
+  data files) is refused, and so are two cells that name one variable (`City` twice, or `Shown` and `#Shown`). The
+  reply's `defined` lists the variables the import defined. While the variables are
   locked, an import whose header would define a variable fails with "variables are locked".
 - Variable libraries: `variable.loadLibrary {path|xml|dataBase64}` (the Variables panel menu's Load Variable
   Library…) replaces the document's variables and data sets with a variable library's in one undo step. The library