•  "Error: there is no document" (Adobe Illustrator Javascript)

Hi @dimitri_cas, As suggested by @m1b  change palette to dialog and also, adding event on click before you show the window, will solve the problem.

Try following.

#target Illustrator
#targetengine main

// Define palette position
var myPalette_XPOS = 750;
var myPalette_YPOS = 30;

// PALETTE
// =======
var myPalette = new Window('dialog', 'DC TOOLS');
myPalette.orientation = "column";
myPalette.alignment = "center";
myPalette.alignChildren = ["center", "top"];
myPalette.spacing = 1;
myPalette.margins = 20;

var button10 = myPalette.add("button", undefined, "IMG Scale");
button10.alignment = ["center", "top"];

myPalette.frameLocation = [myPalette_XPOS, myPalette_YPOS];


// Button interaction
button10.onClick = function () {
    alert("Button clicked!"); // Ensure the button works
    try {
        // Debug: Check if any document is open
        if (app.documents.length === 0) {
            alert("No document open.");
            return;
        }

        var myDoc_DC = app.activeDocument;
        alert("Active document: " + myDoc_DC.name); // Active document check

        var IMG_selected = myDoc_DC.selection;
        alert("Selection length: " + IMG_selected.length); // Check selection length

        if (IMG_selected.length === 0) {
            alert("No objects selected.");
            return;
        }

        var selectedItem = IMG_selected[0];
        alert("Selected item's typename: " + selectedItem.typename); // Check typename

    } catch (error) {
        alert("Error: " + error.message); // Catch any runtime error
    }
};

myPalette.show();

Hi @dimitri_cas, could you try changing "palette" to "dialog" and see if that helps? Palettes are more involve to get working and will need some extra code.

- Mark