There is still WIP for WBS XXXXX. Message KO450

The detailed suggestion appearing as below:

Diagnosis

The WIP for WBS SG-100058-PS has not been cleared.

System Response

WBS SG-100058-PS cannot be deleted.

Procedure

Calculate the WIP for WBS SG-100058-PS so that it can be cleared. Then settle WBS SG-100058-PS, including the cleared WIP in the settlement.

question:

1. How to know the amount that is pending for WIP posting?

2. what does it mean by settling the WBS including the cleared WIP?

I tried to look in the previous threads but could not find a suitable solution

Thanks & Regards,

Ram.