While upgrading our GP from GP2010 SP3 to GP2013 SP1, DYNAMICS database upgrade stopped unexpectedly with GP crashing without any information for me to debug.
But it stopped exactly at table syExcelReports and crashed. Without spending anymore time, I just went and checked my ODBC DSN setup, as explained by Aaron Berquist on his blog High Dynamics Range. Expectedly, the ODBC DSN driver was not pointing to SQL Server Native Client 10.0.
For some reason, GP fails to process upgrade further if your DSN driver is NOT native client 10.0 or above.
Those who upgrade your GP to latest version, please check DSN before you start database upgrade using GP Utilities.