SAP Note 28656 - Incorrect entry in TCJ01 (TCode OPSK)

Symptom:

Projects cannot be created in a client. No correct entry exists in table TCJ01.

Cause and prerequisites

The existing entry was deleted with
TCJ01-ARGUM = 'X'
using the client comparison
When a new entry is copied, TCJ01-ARGUM is not filled. As a result, the application no longer finds an entry.

Solution
Use transaction SE11 to set the maintenance attribute for field V_TCJ01-ARGUM to ' ' in view V_TCJ01