Integration error "Linked value 0 does not exist" from iVend to SAP

Integration error "Linked value 0 does not exist" from iVend to SAP

Version

6.6 and Not the Version specific

Issue

 Error in Integration failure monitor (from iVend to SAP), below is the error:

System.Exception  DI  [OCRD.GroupCode] , 'Linked value 0 does not exist'
   at ReplicationSBOIntegrationWinSer.IntegrationObjects.Customer.Replicate(Direction From, Direction To, Int32 DatasetRowID) at ReplicationSBOIntegrationWinSer.Integrator.MainStart(DateTime LastRetryAt, Boolean  Retried)

These are for the type Customer and update events.

Solution

 Go to the SAP Database and run the below query: 
Select * from OCTG
And check that, if result have any entry as Zero (0) in the column GroupNum or not?
If there is any entry for the GroupNum column as zero then ask customer to change it, as it should not have zero in this column.
(This is for Payment Term, and it should not have any entry for GroupNum column as 0)