Hello Sameer,
This kind of error can be due to the inconsistencies in the address data,. If so,
Could you please check the following reports to confirm if the data are consistent or not:
1064373 : Report to clear the address inconsistencies BU
1062569 : Report to generate BUT020 records
865271 Report to get the inconsistency with address
You can run the reports in test mode, in CRM side first.
Regards,
Sonal