In a map transform I have a new field with the name "EpicoreCustomerCount". In the same map transform I have a few fields which attempt to access this field via "%EpicoreCustomerCount".

I changed the name of the field to "EpicoreCustomerIdCount", and now when I attempt to process the dataset I get the error "Exception has been thrown by the target of the invocation."

Nothing is written to ErrorLog and it makes it IMPOSSIBLE to troubleshoot this.

I now have 2 options:

• Rebuild entire IMan job after this Map transform, which would take literally hours.
• Deal with a poorly named field which could lead to confusion later.

Either way I end up wasting hours.  Can we please have better error handling?  Or write the error to the log?  Or write the error to the screen?  Please just anything other than throwing an unhelpful error message which kills IMan.