Message type: E = Error
Message class:  FKK_ID_PT_SIGN - Digital Signature Portugal FI-CA/IS 
Message number: 004
Message text: Digital Signature is not allowed to be created for this document
The document contains a company, a fiscal year or a number range
information that is related to your settings.
The system cannot find the valid prerequisite data to create a digital
signature to be validated by the tax authorities. The system stops the
processing of the document.
The document needs to process the same data as defined in your settings.
Check your settings in the <ZH>DFKK_PT_NUM_RULE</> table. Check the
event coding dealing with the official document number (1190, 1191,
1192), and if required, adjust your customizing/coding.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message FKK_ID_PT_SIGN004 indicates that a digital signature cannot be created for a specific document. This error typically arises in the context of SAP Convergent Charging or SAP Contract Accounts Receivable and Payable (FI-CA) when dealing with electronic documents that require digital signatures for validation or compliance purposes. Causes: Document Type Restrictions: The document type you are trying to sign may not be configured to allow digital signatures. Certain document types in SAP may have restrictions on digital signatures based on business rules or configurations. Configuration Settings: The system may not be properly configured to support digital signatures. This could include missing settings in the document management system or in the digital signature configuration. User Authorizations: The user attempting to create the digital signature may not have the necessary authorizations or roles assigned to perform this action. Document Status: The document may be in a status that does not allow for digital signatures
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