Windows 10, Illustrator 25.2.3 | System info attached and repro file attached.

There are 2 artboards and asset exports defined in the file.

They are the same illustration with 1 difference - the "grouped" version has a set of paths grouped together, and the "compound" version has those same paths combined into a compound path.

I ran 3 test exports with my repro file, increasing paths: first 500 paths, then 1000 paths, and finally 1500 paths. Here's the export times:

Test 1 | 0500 paths | Grouped: 10 seconds | Compound: 130 seconds
Test 2 | 1000 paths | Grouped: 14 seconds | Compound: 300 seconds
Test 3 | 1500 paths | Grouped: 15 seconds | Compound: 430 seconds

The CEP HTML Engine is churning the whole time the export is pending, so there might be an issue with how it handles these compound paths.

The performance issue aside - Illustrator does not warn the user this delay is happening. Instead, it says the export is completed. This is a really confusing issue to experience and it can cause serious problems.

Even if you disable 'export in background', this delay happens invisibly in the background.

If the user is overwriting existing files, they really will think the export is complete:
- They seem to have the files they expect in their destination folder.
- Illustrator has reported that the export is complete.

But it isn't. Unless they check the timestamps on the files, they are going to move forward with their old files.

This issue really compounds if there are multiple assets being exported that all trigger this delay, because they trickle in to the export folder as they finish. The only way to know when these files are completed is to record the actual time you start the export, and check every timestamp for the files you're looking at to make sure they've been updated after that point. Yikes.

The final issue, and maybe the craziest to me - if the user closes Illustrator during this delay, Illustrator will actually delete the JSON export file from AITEMP but not finish the export! The export just gets abandoned without the user knowing.

Please for my sanity, resolve this issue. This was a doozy to sort out so I hope this info helps!

SYSTEM DETAILS
OS Name Microsoft Windows 10 Home
Version 10.0.19042 Build 19042
OS Manufacturer Microsoft Corporation
System Manufacturer HP
System Model OMEN by HP Laptop 15-dc0xxx
System Type x64-based PC
Processor Intel(R) Core(TM) i7-8750H CPU @ 2.20GHz, 2208 Mhz, 6 Core(s), 12 Logical Processor(s)

Illustrator 25.2.3 (64-bit)

Steps to reproduce (not consistently happening though?):
- Make artboard in Illustrator 4096x4096 (or other power of 2 canvas)
- Make something on it
- Export for Screens, export artboard, png filetype
- BUG: Exported .png has the dimensions 4097x4096 in Properties->Details
- Import to Unity
- Upgrade MaxSize compression to 4096
- Inspector now says the file can't be compressed because it isn't in the right format (it is now 4096x4095)

Expected result:
- File compresses correctly and stays as 4096x4096.
- The expected result seems to work fine if exporting from Illustrator with "Save for Web"

Problem Description:
When exporting an ai file via script or action, the exported ai file cannot be [Save], [Save As], or [Save a Copy].

• Specify ILLUSTRATOR11 or lower for compatibility and true for saveMultipleArtboards.
• This problem does not occur when ILLUSTRATOR12 or higher is specified or saveMultipleArtboards is false.
• The version of the original ai file is not relevant to the operation.
• It happens in both ExtendScript and AppleScript.

Environment:
• macOS 10.14.6
• Illustrator CS6(16.2.1)-2021(25.2.3)

Steps to Reproduce:
1. Open an appropriate ai file and execute the script in the [Code to execute] section.
2. Open the exported ai file in Illustrator, edit it in some way, and save it.

Actual Result:
Illustrator will not be able to save the document and nothing will happen. The file name displayed in the window is still marked with *. When I close the document, it asks me if I want to save it, but I cannot save it.

Expected Result:
The document will be saved.

Any Workarounds:
• Save the document manually, without going through any scripts or actions.

Similar report:
[SAVING FILE NOT WORKING – Adobe Illustrator](https://illustrator.uservoice.com/forums/601447-illustrator-desktop-bugs/suggestions/42797384-saving-file-not-working)
[File won't SAVE nor SAVE AS; only SAVE AS COPY – Adobe Illustrator](https://illustrator.uservoice.com/forums/601447-illustrator-desktop-bugs/suggestions/42797342-file-won-t-save-nor-save-as-only-save-as-copy)

Code to execute:
(function() {
var doc = app.documents[0] ;
var dstFile = new File(doc.fullName).saveDlg() ;
if(!dstFile) {return ;}

var aiOpt = new IllustratorSaveOptions() ;
aiOpt.compatibility = Compatibility.ILLUSTRATOR10 ;
aiOpt.saveMultipleArtboards = true ;
aiOpt.artboardRange = '1' ;

doc.saveAs(dstFile, aiOpt) ;
})() ;

The following is in Japanese>

書き出したaiファイルが2度と保存できない

【説明】
スクリプトまたはアクション経由でaiファイルを書き出すと，書き出したaiファイルは［保存］［別名で保存］［複製を保存］ができなくなる。

• compatibilityにILLUSTRATOR11かそれ以下，saveMultipleArtboardsにtrueを指定する
• ILLUSTRATOR12以上またはsaveMultipleArtboardsがfalseの場合この問題は発生しない
• 元となるaiファイルのバージョンは動作に関係しない
• ExtendScriptでもAppleScriptでも起こる

【動作環境】
• macOS 10.14.6
• Illustrator CS6(16.2.1)〜2021(25.2.3)

【再現手順】
1. 適当なaiファイルを開き，【実行するコード】項目のスクリプトを実行する
2. 書き出されたaiファイルをIllustratorで開き，何か編集をして保存する

【実際に起こる動作】
Illustratorは書類を保存できず何も起こらない。ウインドウに表示されたファイル名には*がついたままでいる。書類を閉じると保存するかどうか尋ねられるが，保存はできない。

【期待する動作】
書類が保存される。

【回避策】
• スクリプトやアクションを経由せず，手作業で保存する

【よく似た報告】
[SAVING FILE NOT WORKING – Adobe Illustrator](https://illustrator.uservoice.com/forums/601447-illustrator-desktop-bugs/suggestions/42797384-saving-file-not-working)
[File won't SAVE nor SAVE AS; only SAVE AS COPY – Adobe Illustrator](https://illustrator.uservoice.com/forums/601447-illustrator-desktop-bugs/suggestions/42797342-file-won-t-save-nor-save-as-only-save-as-copy)

【実行するコード】
(function() {
var doc = app.documents[0] ;
var dstFile = new File(doc.fullName).saveDlg() ;
if(!dstFile) {return ;}

var aiOpt = new IllustratorSaveOptions() ;
aiOpt.compatibility = Compatibility.ILLUSTRATOR10 ;
aiOpt.saveMultipleArtboards = true ;
aiOpt.artboardRange = '1' ;

doc.saveAs(dstFile, aiOpt) ;
})() ;