SAP Note 15282 - ME21 termination: SAPLKACB screen 9000 does not exist

Symptom:

When customer creates a purchase order (ME21), the program terminates because screen 9000 of program SAPLKACB does not exist. Occurs with account-assigned items.

Cause and prerequisites

An entry for screen 9000 exists in table TCOBL.

Solution
The existing entry must be deleted. Because the table can only be maintained by SAP, you may have to write a small program:
report zztcobl1. tables: tcobl. delete from tcobl
where dynnr = '9000'.