Message type: E = Error
Message class:  FINS_SIS_CUST - Impl. of Doc. Splitting: Customizing 
Message number: 126
Message text: Company code &1 is assigned to project &2 and has been deactivated
Company code &V1&<(>,<)> which is assigned to project &V2&, has been set
to <LS>Inactive</> in the <LS>Document Splitting</> Customizing.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
You can either remove the assignment of project &V2& to company code
&V1& or you can reactivate company code &V1& in the <LS>Document
Splitting</> Customizing.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message FINS_SIS_CUST126 indicates that a specific company code is assigned to a project but has been deactivated. This can occur in the context of SAP's Project System (PS) or Financials, where certain configurations or settings may lead to this error when trying to perform transactions related to the project.
Cause: Deactivation of Company Code: The company code referenced in the error message has been deactivated in the system. This means that it is no longer available for transactions, which can lead to issues when trying to associate it with active projects. Project Status: The project itself may have a status that does not allow for transactions to be processed with a deactivated company code.
Configuration Issues: There may be configuration settings in the system that need to be reviewed, particularly in the Project System or Financial Accounting modules.
Solution: Reactivate the Company Code: If the company code needs to be active for the project,
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