HTTP 500 error and nothing logged to trace.log??

I have yii app and a number of modules running (rbam, admin, shop) on my local development system (windows running xampp for server and mysql) - everything is working fine.

Set everything up on a remote linux server (@ and after fixing up table names for case sensitivity (authitem vs. AuthItem, etc) the app, admin and rbam are working fine, but shop just dumps the HTTP 500 error.

I’m running in debug mode, and the trace.log file shows lots of info for other actions, but when selecting the shop link and getting the error, the log file doesn’t grow - nothing is logged by yii when this error occurs??

What are some things I could change to try different situations? test different potential issues??