Message type: E = Error
Message class:  FKK_ID_PT_SIGN - Digital Signature Portugal FI-CA/IS 
Message number: 602
Message text: Print pattern cannot be read; data & not available
Mandatory data needed to access the document that retrieves the print
pattern value is not available.
Document or ODN tables cannot be accessed because the document number is
incomplete. The system aborts the process.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Check if the implementation of function modules  FKK_PT_GET_PRINTCHAR
and FKK_PT_GET_GEN_PRINTCHAR in the printing program is submiting all
mandatory data to the function modules interface.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message FKK_ID_PT_SIGN602 indicates that the print pattern for a specific document or item cannot be read because the required data is not available. This error typically occurs in the context of the SAP Convergent Charging or SAP Contract Accounts Receivable and Payable (FI-CA) modules, where print patterns are used for generating invoices, statements, or other financial documents.
Cause: Missing Print Pattern: The specified print pattern may not be defined in the system. Data Not Available: The data required to generate the print pattern might be missing or not properly configured. Authorization Issues: The user may not have the necessary authorizations to access the print pattern.
Configuration Issues: There may be issues with the configuration of the print layout or the associated forms. Incorrect Document Type: The document type being processed may not be linked to a valid print pattern.
Solution: Check Print Pattern Configuration: Go to the transaction code SPRO and navigate to the relevant configuration
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