How To Fix VLA023 - Error during lock of selected deliveries

SAP Error Message - Details

• Message type: E = Error

• Message class: VLA - General Output Class for Delivery

• Message number: 023

• Message text: Error during lock of selected deliveries

What causes this issue?

An error occurred as the selected deliveries were being locked. Either
one of the deliveries involved is being processed or there is an error
in lock management.

System Response

If group output processing is defined for the group type, the system
locks the deliveries that are to be put together in that group to make
sure that the deliveries involved are not currently being processed. In
this case, the deliveries cannot be refreshed (during dispatch of
picking output, for example). The multiple block is lifted before the
outputs are updated.

How to fix this error?

Make sure that none of the selected deliveries are currently being
processed and then attempt the action again.

Error message extract from SAP system. Copyright SAP SE.