How To Fix PO421 - Unable to send data

PO421 - Overview

• 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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

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.

PO421 - Details

• 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