Diagnosis
This can be caused by one of the following:
1 = WM reference locked
2 = Unforeseen error cause
3 = Unforeseen error cause
RESET N1
Cases 2 and 3 are probably due to an error in an ABAP/4 program.

System Response
It is not possible to create picking waves.

Procedure
In case 1, wait and try again later. If the WM reference is stilllocked, please inform your system administrator.
In cases 2 and 3, inform your system administrator.