Date Error on the Service Order while using service product

Hi PM experts,

I am working on the scenario resource-related billing, using service product in the service order created from a service notification linked to a contract with service product as the line item. service product is the material of DIEN material type.

when i was trying to save the service order created using transaction code-IW31, i am getting the Error Message:

" *SYS:Date 00.00.0000 not expected*".

This error started only yesterday, and it was not there before. Basis team has confirmed that they have not done any new

updates to the system.

Had anyone encounered this problem before, if yes kindly let me know the solution and the steps to resolve it.

thanks for the help.

regards,

rajaraman