https://userapps.support.sap.com/sap/support/knowledge/en/2563497
2563497 - F4 help for field MATNR does not display the selection screen in WM | SAP Knowledge Base...
Since uprade to release 618 or S4HANA the F4 help for field 'Material' in WM transactions has been changed Since uprade to release 618 or S4HANA the F4 help...