The FI document & / & / & is locked by another user.

What causes this issue?

The FI document &V1& / &V2& / &V3& which is a receiveable or a payable
is locked by another user. Therefore it can not used for this netting
process.

System Response

System warning

How to fix this error?

Continue if it is not neccessary that the locked document has to be
netted
Start this transaction again, when this document is no longer locked

Error message extract from SAP system. Copyright SAP SE.