cj8g backroung processing

Hi Gurus

When i try to settle WBS elements in cj8g in background processing I receive following dump:

-

Error analysis

    A RAISE statement in the program "SAPLKAOP" raised the exception

    condition "KOKRS_NOT_SET".

    Since the exception was not intercepted by a superior

    program, processing was terminated.

Trigger Location of Runtime Error

    Program                                 SAPLKAOP

    Include                                 LKAOPU01

    Row                                     79

    Module type                             (FUNCTION)

    Module Name                             K_PROJECT_SELECT

I have tried this note 170948 - Status inconsistency in work breakdown structure and it did not help me.

Can You help me?

Regards

Jan