Message type: E = Error
Message class:  9J1UFDI - Messages for Ukraine E-Invoices 
Message number: 026
Message text: Document &1 &2 &3 is registered in ERPN, and cannot appear in Annex 8.
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The SAP error message 9J1UFDI026 indicates that a specific document (identified by the parameters &1, &2, &3) is registered in the ERP system but cannot be included in Annex 8. This error typically arises in the context of electronic invoicing or reporting, particularly in countries where specific tax reporting formats are required, such as Spain.
Cause: Document Status: The document may not be in a status that allows it to be reported in Annex 8. For example, it might be in a draft state or not fully processed. Document Type: The document type may not be eligible for inclusion in Annex 8. Certain types of documents may be excluded based on local regulations.
Configuration Issues: There may be configuration settings in the SAP system that prevent the document from being included in the report. Missing Data: Required fields or data may be missing from the document, making it invalid for reporting purposes.
Solution: Check Document Status: Verify
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