How To Fix PO421 - Unable to send data

SAP Error Message - Details

• Message type: E = Error

• Message class: PO - Spooler message

• Message number: 421

• Message text: Unable to send data

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message PO421 - Unable to send data ?

  The SAP error message PO421 "Unable to send data" typically occurs in the context of the SAP system when there is an issue with data transmission, often related to the output processing of purchase orders or other documents. Here are some common causes, solutions, and related information for this error:
  Causes:
  
  Configuration Issues: The output type may not be properly configured in the system. This includes settings for the output medium, partner functions, or conditions.
  Missing Master Data: Required master data (like vendor or customer information) may be incomplete or missing.
  Communication Problems: There may be issues with the communication settings, such as incorrect email addresses or problems with the output device (e.g., printer).
  Authorization Issues: The user may not have the necessary authorizations to send the output.
  Technical Errors: There could be underlying technical issues, such as problems with the SAP application server or network issues.
  
  Solutions:
  
  
  Check Output Configuration:
  
  Go to the output determination settings for the relevant document type (e.g., purchase order).
  Ensure that the output type is correctly configured and that the necessary conditions are met.
  
  
  
  Verify Master Data:
  
  Check the vendor or customer master data to ensure all required fields are filled out correctly.
  Make sure that the relevant partner functions are maintained.
  
  
  
  Review Communication Settings:
  
  If the output is supposed to be sent via email, verify that the email address is correct and that the email server settings are properly configured.
  For print outputs, ensure that the printer settings are correct and that the printer is operational.
  
  
  
  Check User Authorizations:
  
  Ensure that the user has the necessary authorizations to execute the output processing.
  Review the user roles and profiles to confirm that they include the required permissions.
  
  
  
  Analyze Technical Logs:
  
  Check the SAP application logs (transaction SLG1) for any additional error messages or details that can provide more context about the issue.
  If necessary, consult with your SAP Basis team to investigate any underlying technical issues.
  
  
  
  Test Output Processing:
  
  Try to manually trigger the output processing for the document to see if the error persists.
  This can help isolate whether the issue is with a specific document or a broader system issue.
  
  
  
  Related Information:
  
  Transaction Codes: You may find it helpful to use transaction codes like ME23N (Display Purchase Order) to review the purchase order details and output settings.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Documentation: Refer to SAP documentation for output determination and processing to ensure that all necessary configurations are in place.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP support team or reach out to SAP support for further assistance.