How To Fix RLFW002 - After import method &1 uses qRFC or bgRFC.

RLFW002 - Overview

• Message type: E = Error

• Message class: RLFW - Messages for runlevel framework

• Message number: 002

• Message text: After import method &1 uses qRFC or bgRFC.

What causes this issue?

A source code scan of function &V1& revealed the usage of RFC calls of
the form
'call function <FUNC> in background task'
or
'call function <FUNC> in background unit'
Such calls will not be executed in 'Zero Downtime Maintenance'
upgrades(ZDO). The reason is that the above RFC variants are disabled in
the upgrade systems on which the after import methods (AIM) are
executed.

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?

Remove any calls of the above RFC variants from the AIM to ensure that
data changed by the AIM are consistently handled during upgrades
conducted with the ZDO

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

RLFW002 - Details

• The SAP error message RLFW002 typically occurs when there is an issue with the queuing mechanism used in the background processing of Remote Function Calls (RFC) in SAP, specifically when using qRFC (queued RFC) or bgRFC (background RFC). This error can arise during the import of data or when executing certain methods that rely on these queuing mechanisms.
  
  Cause:
  The error message RLFW002 indicates that there is a problem with the import method that is trying to use qRFC or bgRFC. Common causes include:
  
  Queue Issues: There may be issues with the queue itself, such as it being locked, not being processed, or having entries that are not being executed correctly.
  Configuration Problems: The configuration for qRFC or bgRFC might not be set up correctly, leading to failures in processing.
  Network Issues: Connectivity problems between systems can also lead to failures in executing queued RFC calls.
  Transaction Errors: If there are errors in the transaction that