3555492 - Mandatory Custom Field Check not executed in ME21n without opening Custom Fields tab

• While creating a purchase order using ME21n, a custom field is set to obligatory in MM_PUR_S4_PO_FLDCNTRL_SIMPLE_H.
• The check for obligatory is not executed if the custom fields tab is not opened.
• The issue arises because the field can be saved without any entry if the custom tab is not opened.

SAP S/4HANA Cloud Public Edition

ME21n, Purchase Order, Custom Field, Obligatory, MM_PUR_S4_PO_FLDCNTRL_SIMPLE_H, BAdI, MM_PUR_S4_PO_MODIFY_HEADER, BD_MMPUR_FINAL_CHECK_PO, Mandatory Fields, Business Logic, Manage Purchase Order. , KBA , MM-PUR-PO-2CL , Purchase Orders (Public Cloud) , Problem