I've written a BIRT reporting building block that works just fine on a DVM upgraded to the latest version available i.e. 3700.0.4-rel.20+ded7cc5. The building block also works fine on the JDK11 DVM which we got from the JDK 11 developer technical preview folks i.e. 3700.99-ci.694.corretto11 beta box.
...the SaaS sites run a slightly different version of 3700 than is available for download for self hosted sites so I can't run this on exactly the same version as the client SaaS sites are running (unless this is available from somewhere?).
I've been through the logs from a couple of SaaS sites that I tried testing on and I can't see anything being output there.
Does anyone have any other suggestions for how to debug this kind of thing without access to the back end of a SaaS site?