I'm using PLSD 15.04.2064 64-bit. We recently moved from an on-prem database to an AWS one, and I'm getting this error a lot. Tries to relog on a few times, and then it's successful.

Note that I'm not having this trouble with Oracle's SQL Developer.

PL/SQL Developer uses the Oracle Client, which Oracle SQL Developer does not. This may explain the difference.

Can you go to Help > Support Info and send the text from the "Info" tab page to support@allroundautomations.com?

Our Oracle team figured out a solution. Include the following line in sqlnet.ora:

DISABLE_OOB=ON

That seems to have fixed the problem.

Great, thanks for the update!