The BAPI may not be used in an update process

What causes this issue?

You want to call a BAPI for an update (commit) or rollback. However,
the program is already carrying out an update process at the moment.
The BAPI may not be used during the update process.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Check where you are accessing the BAPI. It may not be used within
update modules.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.