Message type: E = Error
Message class:  VN - Nachrichtensteuerung 
Message number: 073
Message text: Errors occurred while processing output
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The SAP error message VN073 - Errors occurred while processing output typically appears in the context of purchasing documents (like purchase orders) when the system encounters issues while trying to process or print output messages (such as print forms, emails, or faxes). Cause Output determination issues: The system could not find a valid output type or condition record for the document. Communication errors: Problems with the communication medium (printer, email server, fax server). Incorrect or incomplete configuration: Output device or form not properly configured. Authorization problems: User or system lacks necessary authorizations to process output. Technical errors in the output program or form: Errors in the print program, smart form, or Adobe form. Data inconsistencies: Missing or incorrect data required for output processing. Spool system errors: Issues with the SAP spool system or print queue. Solution Check Output Determination: Verify that the output type is correctly assigned to the purchasing document type. Use transaction NACE (or BRF+ in newer SAP versions) to
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