This came up a few days ago at a client site during an upgrade being done by a colleague and then again when I was running a training session.
When I was doing the training I was explaining what a Temporary Creditor (or Vendor for the American readers) was and why I hated them so much. As I was talking I was showing that even through the temporary creditor itself had been deleted, the history for it remained.
It was when I tried to open the Payables Transactions navigation list that I got the below error:
Microsoft Dynamics GP
[Microsoft][SQL Server Native Client 11.0][SQL Server]Cannot insert the value NULL into 'VENDNAME', table 'tempdb.dbo.##181163', column does not allow nulls. INSERT fails.[Microsoft][SQL Server Native Client 11][SQL Server]Cannot insert the value
After clicking OK, the navigation lists display, but only with a very small number of transactions listed when there should have been far more:
I created another creditor with the same ID, and the navigation list loaded correctly.
If you see this error have a look for transactions which are not correctly linked to a record in PM Creditor MSTR (PM00200); you will then need to create a creditor with the same Creditor ID and set it to Inactive.
From a discussion with Microsoft, this is a known issue currently under investigation so hopefully a fix will be forthcoming.
Read original post Navigation List Error: "Cannot insert the value NULL into column 'VENDNAME'" at azurecurve|Ramblings of a Dynamics GP Consultant