Need Packaging material data in Sales/General Plant view for FERT material. In OMS9 in which field MARA-???? should be there?
Tcode OMS9 -->In field Selection Group select MARA-VHART then select FERT and take Hide to Opt. Entry. If you need to check How MARA-VVHART is found, go to \MM03 any VERP material. Select Sales/General Plant view and here on Packaging material search F1 to find fields.This will resolve your issue as below screen shots.
Still if any questions let me know.