convert the logical system name for your PROD to QAS.

BDLS will convert the logical system name for your PROD to QAS.

For eg:

Your source - PRDCLNT100

Your target - QASCLNT100

If you go to SCC4 in your QAS, u will see Prod logical system name for the client.

Once you run BDLS after system copy, logical system name exist in every table for PRDCLNT100 will change to QASCLNT100.