add more information about upload fail

I tried to upload SBGN file (which is incorrectly drawn - process is left with no reactants): SBGN-with-process.sbgn. The upload fails with error in log:
Problem with uploading map: Unable to parse the process: nwtN_c9c80149-ba98-44fe-a40c-e2ebb098d21a. More details can be found in log file..