Message type: E = Error
Message class:  FINS_SIS_CUST - Impl. of Doc. Splitting: Customizing 
Message number: 136
Message text: The subsequent implementation of doc. splitting isnÆt supported in PSM
The subsequent implementation of document splitting isn?t supported in a
public sector management scenario.
Error message
The subsequent implementation of document splitting isn?t supported in a
public sector management scenario.
Therefore, you shouldn?t run the activities for the subsequent
implementation of document splitting.
You can change the configuration of this message type in test systems,
but you aren't allowed to change it in a production system environment.
The message type can be adjusted in non-productive systems (only) using
transaction  <DS:TRAN.OBA5>Message Control by User</> with application
area FINS_SIS_CUST, message number 136. If the message type is 'I'
(Info), 'S' (Success) or 'W' (Warning), it will be possible to perform
the current operation.
Please note that if you decide to run the activities for the subsequent
implementation of document splitting in a test system, SAP won?t provide
support for any issues that arise.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message FINS_SIS_CUST136 indicates that there is an issue related to document splitting in the Public Sector Management (PSM) module. This error typically arises when you attempt to implement document splitting after certain configurations or transactions have already been processed, which is not supported in the PSM environment.
Cause: Document Splitting Configuration: The error usually occurs when document splitting is not activated or configured correctly in the system for the PSM module. Subsequent Implementation: If document splitting was not initially set up during the configuration of the PSM module, trying to implement it later can lead to this error. PSM has specific requirements and limitations regarding document splitting. Existing Transactions: If there are already posted documents in the system, enabling document splitting afterward can cause inconsistencies, as the system cannot retroactively apply splitting rules to already posted documents.
Solution: Check Configuration: Ensure that document splitting is correctly configured in the system. This includes checking
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