topic Re: Run route : Could not find or load main class in Talend Studio

Run route : Could not find or load main class

StefaanSomers — Wed, 12 Mar 2025 07:01:06 GMT

I was able to run my route in Talend Studio a day ago.

But now after opening Talend Studio when I run the job I suddenly get this message. I see indeed that no classes are created, but I don't find any clue why this is not the case.

Re: Run route : Could not find or load main class

quentin-vigne — Wed, 12 Mar 2025 08:07:37 GMT

Hi @StefaanSomers

I’ve had the same issue with normal jobs before; one day, the job suddenly stops running, and I get the same error message.

You have a few options:

If you’re using Git with Talend, try checking out a previous commit from your Git history (before any recent modifications) and reapply the changes manually.
Recreate your route by copying and pasting the existing components into a new route. This often resolves the issue.
If you have a backup of your project or are using Git, you can also uninstall and reinstall Talend Studio as a last resort.

Since upgrading to Talend Studio R2024-06, we haven’t encountered this issue anymore, but it was a frequent problem in the past.

Hope it helps,

- Quentin

Re: Run route : Could not find or load main class

StefaanSomers — Wed, 12 Mar 2025 14:25:44 GMT

After I restarted my Talend Studio for the third time, it suddenly worked again. I would expect there is a kind of rebuild total project is available in Talend Studio...