Sorry for late reply, was on vacations.

> The default TPB mappings are not the ones I want, but I can't get the driver to override the
> default settings. All I really want is _nowait instead of _wait. Here's what I've tried (that
> hasn't worked yet, despite lots of restarting tomcat, redeploying the web-app, and looking through
> log files for any errors thrown by the FB driver):

I did not try specifying the TPB in Tomcat 6, but I would expect that
adding


TRANSACTION_REPEATABLE_READ=isc_tpb_concurrency,isc_tpb_write,isc_tpb_nowait

to your JDBC URL should work. I will try on weekend this and will report
back.

Roman