Hello, I’m trying to upload a module and am getting an API 408 error. I’m not sure what’s wrong this time. File size maybe?
How large is the file?
File size is 300.8 MB 
It’s slightly over the size limit. Have you already removed unused images?
I have. I can try to get it a little smaller. What’s the file size limit?
The current limit is 300MB.
If you’ve already removed all the unused images, there are two things I’d suggest:
- Run a PNG optimizer such as optipng over all the PNGs.
- Rezip the module at maximum compression.
If neither of those get you under 300MB, let me know.
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Hey Joel, I got file size down to 260mb. But I’m still getting this stupid API 408 error. I’ve double-checked the version number matches the file name. Is there something else I could be doing wrong? Feels like this new website is constantly fighting me…
Is there somewhere I can download the module so I can see it? (Note that I might be slow to act in the next few days because I’ll be traveling.)
Thanks Joel. The file is on my OneDrive: Microsoft OneDrive
I took a quick look at the module. I don’t see anything obviously wrong. I’m still tied up for a few more days so can’t really dig into this further until then. Try uploading the module again.
Thanks for responding. I tried again this evening. Still getting the same error. I signed out of VASSAL, re-signed in. That didn’t work either. I’m out of ideas…
I will get back to this, but maybe not for a few days due to my father having had an operation yesterday.
I have time now to pursue this problem. Please try uploading the file again and let me know when you’ve tried.
Thanks, Joel. I tried again. Got the same API Error 408.
I see this in the log:
2026-01-17T20:53:38.140321Z INFO request{source=158.62.192.93 method=POST uri=http://vassalengine.org/v1/projects/Assault_Sicily_43_-_Gela_Beachhead/packages/Module/1.2.1/AssaultSicily1.2.1.vmod version=HTTP/2.0}: starting add_file
2026-01-17T20:53:38.141285Z INFO request{source=158.62.192.93 method=POST uri=http://vassalengine.org/v1/projects/Assault_Sicily_43_-_Gela_Beachhead/packages/Module/1.2.1/AssaultSicily1.2.1.vmod version=HTTP/2.0}: created temp file uploads/atmp_7474557fd07ffd8d20696bf6d285e8541
2026-01-17T20:58:38.190932Z INFO request{source=158.62.192.93 method=POST uri=http://vassalengine.org/v1/projects/Assault_Sicily_43_-_Gela_Beachhead/packages/Module/1.2.1/AssaultSicily1.2.1.vmod version=HTTP/2.0}: finished processing request latency=300052 ms status=408
The code logging the first two messages is here.
We see a log entry for created temp file but not wrote temp file, so the timeout happens between them, which is when the input is being hashed and written to disk.
I don’t understand how receiving the data, hashing it, and writing it to disk could fail to finish in 300s—that would make the transfer rate less than 1MB/s.
What upload speed do you typically see with your internet connection?
We have about as fast of an internet speed as our community has access to. It’s a fiber optic line. I couldn’t say exactly what our upload speed is, but it’s pretty fast.
-Joel
Search for check my internet speed and choose one of the options. Your internet service provide (ISP) may offer one too, which would not be a bad choice.
You may want to run the test a few times and around the time of the day you would normally do an upload.
Yours,
Christian_
Thanks for checking that.
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