Not able to port XMII 11.5 trx to xMII 12.0

When we are porting xMII 11.5 transactions to xMII 12.0 using the migration tool, we get the following error:

Error processing request, Administrator is not assigned to a role that can perform this action

The user we were using was Administrator who has all XMII Administrator and XMII Developer roles assigned to him.

By reading one of the forum, we tried editing trx file manullay in notepad and changed the Read Roles and Write Roles to XMII Administrator, XMII Developer and it worked fine.

Do we have to do this? We have large number of files to port.

Thanks,

Sara