Execution log and errors

When I run a load I get errors and the error message in the log is nebulous in many cases.

OK ... maybe not totally nebulous.

I get a error message like:

error message for operation : <[SAP AG][LIBODBCHDB SO][HDB] General error;287 cannot insert NULL or update to NULL

but that's all i see. I happen to have like 50 fields in that table .... so my question is WHAT FIELD DID THE ERROR OCURR IN?

Surely there is a file somewhere that shows this.

Mike