Dimitri,
I'm not doing any mass copy, I'm just creating extension of the existing message type i:e 5010 ver 812 message type.
I did same for many custom version such UCS,NAV and VICS etc. but now we are facing this issue while creating an extension for 812 BTE.
Its an exception which I get while copying.
"Unexpected error while performing mass copy.Please check the trace for details."
I check trace file but didn't find any entry as such.
Thanks
Niraj