We have a z/OS Connect API that was working fine for about 10 months. We fixed an error related to the length of a security token required. But it is now throwing a BAQR1132E error saying that the relative path is undefined. Nothing has changed with the .ara file or anything else on the server so we don't understand why the relative path (which should be a constant in the project) would be undefined. We also can't find the source code BAQSTUB program from IBM that is throwing the error. So it's all a black box. 

Any suggestions on how to figure out the issue and why it would just stop working after 10 months? Is there a place we can see the BAQSTUB source code?

Steve,
z/OS Connect traces are required to check the difference of behavior. 
We found a support ticket (case) is already opened for this issue. 

Our support team will check the issue and get back ASAP.

Thanks

Nagesh