Solution : https://service.sap.com/sap/support/notes/540147 (SAP Service marketplace login required)
Key words :
short dump 'sapsql_in_itab_illegal_sign' occurs, attached correction instructions, transaction mb26, picking list, select reservations, production orders, production order -, reservation exists, terms ppplfc1, pp_pick_list reason
Related Notes :
542607 | MB26: List reservations partly incomplete |