Message type: E = Error
Message class:  FICUSTOM - Customizable Messages for Funds Management 
Message number: 035
Message text: Document & & & & is part of a request
You want to set the parked document &V2& &V3& &V4& to the status
'Incomplete'.
The document is part of the request with the request number &V1&.
If the message is a warning the document &V2& &V3& &V4&  is removed
from the request by deleting the request number in the current
document.
If the document is an error message the document &V2& &V3& &V4& is not
removed from the request.
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 FICUSTOM035 typically indicates that a document is part of a request, which means that it cannot be processed or modified in the way you are attempting because it is linked to a specific request or transport. This error often occurs in the context of financial documents or when dealing with document management in SAP.
Cause: Document Locking: The document you are trying to modify or delete is currently locked because it is part of a transport request. Transport Request: The document is included in a transport request that has not yet been released or is still in the process of being transported to another system. Authorization Issues: You may not have the necessary authorizations to perform the action on the document.
Solution: Check Transport Request: Verify if the document is part of a transport request. You can do this by checking the transport logs or using transaction codes like SE09 or SE10
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