Illustrator v2024脚本频繁报1346458189('PARM')错误求助

问题背景 #

在Illustrator v2024中，运行各类简单脚本时频繁触发错误：

Error: an Illustrator error occurred: 1346458189 ('PARM')

尝试过调整坐标系等方案仍无法解决，涉及的脚本功能为：获取选中对象的厘米尺寸，生成文本框显示尺寸并将文本框居中到视图。原脚本代码如下：

//this script task: Adds the selected objects to the page in cm.
// The error it gives every now and then is:
// Error: an Illustrator error occurred: 1346458189 ('PARM')
#target illustrator
offsetT=0 
var myDoc = app.activeDocument;
myDoc.rulerOrigin = [0,0];
var sel = app.selection; //sel as selections array.
var str = "";
function essenziki() {
    if(sel.length==0){
        alert("choose something first");
        return
     }

for (var i = 0; i < sel.length; i++) { //loop and check each selected objects
  str += (pt2mm(sel[i].width) / 10+offsetT).toFixed(0) + "*" + (pt2mm(sel[i].height) / 10+offsetT).toFixed(0)+ "\n";
}
str = str.replace(/\n$/, ''); // Replace last line break to empty symbol
var tx = myDoc.textFrames.add();
    tx.contents = str;
tx.textRange.characterAttributes.size=150; 
tx.textRange.characterAttributes.textFont = app.textFonts.getByName('Arial-BoldMT');

app.executeMenuCommand("deselectall"); //deselect all abjects

var cmykColor = new CMYKColor();
cmykColor.cyan = 34;
cmykColor.magenta = 49;
cmykColor.yellow = 19;
cmykColor.black = 27;
tx.textRange.characterAttributes.fillColor = cmykColor; 

app.executeMenuCommand("deselectall"); //deselect all abjects
    tx.selected = true; 

function pt2mm(n){
  return n * 0.35277778;
}

};
essenziki();

if (app.selection.length > 0) {
    var selectedItem = app.selection[0]; // Get the first selected item

    // Get the center of the current view in document coordinates
    var viewCenter = app.activeDocument.activeView.centerPoint; // [x, y] of view center in document coordinates

    // Calculate the center of the selected item
    var itemBounds = selectedItem.geometricBounds; // [left, top, right, bottom]
    var itemCenterX = (itemBounds[0] + itemBounds[2]) / 2;
    var itemCenterY = (itemBounds[1] + itemBounds[3]) / 2;

    // Calculate the offset to move the item to the center of the view
    var offsetX = viewCenter[0] - itemCenterX;
    var offsetY = viewCenter[1] - itemCenterY;

    // Move the item to the center of the view
    selectedItem.translate(offsetX, offsetY);
}

错误原因分析 #

PARM错误通常表示参数传递异常，结合脚本排查出几个核心问题：

• 函数嵌套作用域：pt2mm函数定义在essenziki内部，可能导致Illustrator脚本引擎解析时出现参数绑定问题
• 选择状态操作冲突：多次调用deselectall菜单命令后直接设置选中状态，UI线程与脚本线程不同步，导致参数异常
• 边界情况未处理：未检查app.activeDocument是否存在，若文档未激活会触发参数错误
• 字体获取无容错：app.textFonts.getByName('Arial-BoldMT')若字体不存在会直接抛出参数错误

修复后的脚本代码 #

#target illustrator

// 单位转换函数移至全局作用域
function pt2mm(n) {
    return n * 0.35277778;
}

function essenziki() {
    // 检查是否有激活文档
    if (!app.documents.length) {
        alert("请先打开一个文档");
        return;
    }

    var myDoc = app.activeDocument;
    myDoc.rulerOrigin = [0, 0];
    var sel = app.selection;
    var offsetT = 0;
    var str = "";

    if (sel.length === 0) {
        alert("请先选择对象");
        return;
    }

    // 遍历选中对象生成尺寸字符串（厘米）
    for (var i = 0; i < sel.length; i++) {
        var widthCm = (pt2mm(sel[i].width) / 10 + offsetT).toFixed(0);
        var heightCm = (pt2mm(sel[i].height) / 10 + offsetT).toFixed(0);
        str += widthCm + "*" + heightCm + "\n";
    }
    str = str.replace(/\n$/, '');

    // 创建文本框并设置属性
    var tx = myDoc.textFrames.add();
    tx.contents = str;
    
    // 字体设置添加容错
    var targetFont = app.textFonts.getByName('Arial-BoldMT') || app.textFonts[0];
    tx.textRange.characterAttributes.textFont = targetFont;
    tx.textRange.characterAttributes.size = 150;

    // 设置CMYK填充色
    var cmykColor = new CMYKColor();
    cmykColor.cyan = 34;
    cmykColor.magenta = 49;
    cmykColor.yellow = 19;
    cmykColor.black = 27;
    tx.textRange.characterAttributes.fillColor = cmykColor;

    // 直接清除选择并选中文本框，避免菜单命令的线程延迟
    app.selection = [tx];

    // 将文本框居中到视图
    var viewCenter = myDoc.activeView.centerPoint;
    var itemBounds = tx.geometricBounds;
    var itemCenterX = (itemBounds[0] + itemBounds[2]) / 2;
    var itemCenterY = (itemBounds[1] + itemBounds[3]) / 2;
    var offsetX = viewCenter[0] - itemCenterX;
    var offsetY = viewCenter[1] - itemCenterY;
    tx.translate(offsetX, offsetY);
}

essenziki();

关键修复点说明 #

• 将pt2mm函数移至全局作用域，避免嵌套导致的解析异常
• 添加文档存在检查，防止无激活文档时出错
• 字体获取添加容错，若目标字体不存在则使用第一个可用字体
• 替换app.executeMenuCommand("deselectall")为app.selection = [tx]，直接操作选择数组，避免UI线程同步问题
• 将文本框居中逻辑整合到函数内部，减少全局变量依赖，避免选择状态冲突

内容的提问来源于stack exchange，提问作者enisio