Runtime error during transaction /SCWM/IM_ST

Dear,

I am trying to move stock from bin to bin (mind you: it is a NON-BATCH MANAGED Product; Batch management is NOT set in ERP nor EWM) with transaction /SCWM/IM_ST.

When I enter values and press save I get the following runtime error:

Runtime error: ASSERTION FAILED

ABAP program: /SCDL/CL_BO_MANAGEMENT========CP

I checked KBA 2351603 (and the Note 1305605 mentioned in that KBA) but that does not make sense since my Product is NOT Batch Managed.

Any clues here?

Thanks a lot in advance,

Kind regards,

Bart