While migrating NW 6.0sp5 to NW 6.5 sp4a, I had a failure after the
source server shut down and DS was removed from the destination. I
lost connection the destination. I didn't find anything specific in
the knowledge base relating to the error. Any idea what the problem
was or should I just give it another try?

This was in the error log:

"Source OS Version: 6.0
Source DS Version: 105.51
Destination OS Version: 6.50
Destination DS Version: 105.52

- An error occurred while restoring NDS to server 'TMP-SVR'. --- Error
caused by a NetWare API error --- Network error: Connection invalid
(Error code: 0X8801 Function Name: NWCCGetConnInfo) "