Error loading a table thru IMPDP - ORA-0600 [klpars_12]

I am restoring a fresh copy of PROD data to our TEST database.  This is something that we have done several times before with no problem.  We take EXPDP of the PROD schema, copy the files to the TEST server, and then import the schema (with REMAP) to the TEST schema. 

Both PROD and TEST are 2 node RAC running Oracle 11.2.0.2, and this is a windows environment (Windows 2008R2).   I have checked byte count of the files when I copied from PROD server to TEST server to ensure that the bytecounts are the same.  In the expdp log file, there are no errors.