Hi Lawrence

Please consider an article as found in the following link that may give you an indication of the cause of your query: 

https://za-kb.sage.com/portal/app/portlets/results/viewsolution.jsp?solutionid=200203130007713&page=1&position=1&q=200203130007713

The solution comes down to a company data fix due to duplicate records in perhaps the INVNUM table.

Do you have an Evolution Business Partner that you can ask to perform the company data fix?

Kind Regards

Bennie 

Hi Bennie

Thank you for this. I will definitely have a look and let you know if this helps.

Sure, it's my pleasure, Lawrence!

Hi Bennie

Thank you, again, for the suggestion. I have tried this but, unfortunately, the problem persists. Back to the drawing board.

Hi Lawrence

In that case please log a new Support query with Sage Evolution Support to request a company data fix,  by opening this link.

Otherwise, you can also ask your local Evolution Business Partner to assist.

It's really the only way that your query can be resolved.