Error 1: 'Could not write the file. An assertion has failed'
Specifically on Windows operating system, while uploading multiple artboard via adobe illustrator extension to Techpacker, you may experience this error 'Could not write the file. an assertion has failed'.
Before fixing the error, please make sure to save all your work in every tab opened on your Adobe Illustrator. Now here are some solutions you can try :
1. Reset the illustrator preferences
For some Windows users, simply resetting the illustrator preferences might fix this issue. To learn how to reset the illustrator preferences, use this documentation officially provided by Adobe help-center.
Once your Illustrator preferences have been reset, close and restart your Illustrator and try uploading multiple artboards again. This should fix the issue, but If the issue persists, then continue with the below step.
2. Reset the Save for Web (Legacy) preferences
Step 1: Go to File > Export > Save for Web (Legacy) in your Illustrator.
Step 2: Hold down Ctrl+Alt on your keyboard and you'll see an option to reset. Click on reset and a file will be downloaded to your computer. Once done, try to upload your artboard again.
Even after this, you're still facing this issue, please open a ticket with us and someone from our product team will reach out to you directly to further assist you on this issue.
Error 2: 'First save the artboard before trying to upload'
First, make sure that the .ai file is saved in your local hard-drive. If you are confident that it's saved, then next step is to save it again by using 'Save As' and save it again as .ai file. sometimes Adobe doesn't recognize that the file is saved.
If the problem still persists, then rename the file. The extension doesn't like the word 'untitled' in file name so make sure that you rename the file and remove the word untitled and hopefully that will resolve the issue.
Error 3: 'Prompted to open app in Intel emulation mode after installing plugin'
When you install a plugin or extension on an Apple M1 computer, you are prompted to open the app in Intel emulation mode.
To open the app in Intel emulation mode, Follow these steps as recommended by Adobe here.