Hi Nikki,
The reason could be that WBS element is not selected in relevant customizing. Please check SAP note 1647916. I copied the solution here:
To transfer additional fields to the FI system, you need to select the relevant entries in the customizing table FAGLCOFITRFLDS as follows:
- Call Transaction SM31
- <Enter> The view name "FAGLCOFITRFLDS"
- <Choose> Maintain
- <Select> the fields to be transferred (PS_PSP_PNR: WBS element in your case)
- <Save> the changes
- <Execute> report FAGL_COFI_GENERATOR using SE38 to refresh the changes.
After that, please do a new settlement again to check the result.
Regards,
Sean