Hi Rupesh,
Thank you for the prompt reply !
Initially that was the assumption.
But the status of the WBSE holds good. But luckily I was able to identify the cause, It was related to the Project definition to which WBSE was linked.
In the control tab of Project definition, you will see the field ‘No Project Stock’[Marked in below screen shot]. This field is at present was causing the issue.
Regards,
Avinash