Solution : https://service.sap.com/sap/support/notes/145964 (SAP Service marketplace login required)
Key words :
order &v1& forbids business transaction 'check material availability system response, business transaction 'check material availability', additional key words co01, material availability check, business transaction, transaction se91 message 894, order header screen, order &v1&, availability check, 894 'availability check
Related Notes :
| 171347 | CO02: Availablity check in coll. order not possible |