Message type: E = Error
Message class:  FI_E - Message Class for FM English Developers 
Message number: 137
Message text: Budgeting document type is a required field for the budgetary ledger
You are using the funds management system integrated with the budgetary
ledger (BL). For FM area &V1&, the budgetary ledger is active.
When you use the budgetary ledger, the budgeting document type is
a required field. However, in this case, the budgeting document type is
empty.
The budgeting document type is a required field for the following
reasons:
Budgeting creates a second line with opposite sign for each line
entered for the budgetary ledger in order to create a balanced
document. The second line is created according to the customizing rules
in the account derivation budget entry document (transaction BPACC).
If you are using the account derivation for the federal government of
the United States, the budgeting document type is a required field for
account derivation for the budgeting entries.
The budgetary ledger cannot post this document.
Enter a budgeting document type and try to post again.
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 FI_E137 indicates that a budgeting document type is required for the budgetary ledger, and it typically arises when you are trying to post a transaction related to budget management without specifying a necessary document type. This error is common in the context of public sector accounting or any organization that uses budgetary controls in SAP.
Cause: Missing Document Type: The most common cause of this error is that the budgeting document type has not been specified in the transaction you are trying to execute.
Configuration Issues: There may be configuration issues in the budgetary ledger settings that require a document type to be defined for certain transactions. User Role/Authorization: The user may not have the necessary authorizations to access or specify the budgeting document type.
Solution: Specify the Budgeting Document Type: When entering the transaction, ensure that you specify a valid budgeting document type. This is usually done in the relevant field
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