How To Fix STEP021 - SAP_COMM implementation error (notify SAP development)

SAP Error Message - Details

• Message type: E = Error

• Message class: STEP - ISO 10303 STEP Mapping Messages

• Message number: 021

• Message text: SAP_COMM implementation error (notify SAP development)

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message STEP021 - SAP_COMM implementation error (notify SAP development) ?

  The SAP error message STEP021, which indicates an "SAP_COMM implementation error," typically arises during the execution of a program or transaction in the SAP system. This error suggests that there is a problem with the communication layer of the SAP system, which could be due to various reasons such as configuration issues, network problems, or bugs in the SAP software.
  Causes:
  
  Configuration Issues: Incorrect settings in the SAP system configuration can lead to communication errors.
  Network Problems: Issues with the network, such as connectivity problems or firewall settings, can prevent proper communication between SAP components.
  Software Bugs: There may be bugs in the SAP software that cause this error to occur under certain conditions.
  Missing Authorizations: Lack of necessary authorizations for the user or system can also trigger this error.
  System Load: High system load or resource constraints can lead to communication failures.
  
  Solutions:
  
  Check Configuration: Review the configuration settings related to the communication layer (e.g., RFC destinations, logical systems) to ensure they are correct.
  Network Diagnostics: Use network diagnostic tools to check for connectivity issues. Ensure that firewalls or network settings are not blocking communication.
  Review SAP Notes: Check the SAP Support Portal for any relevant SAP Notes or patches that address this specific error. Applying the latest patches may resolve known bugs.
  User Authorizations: Verify that the user has the necessary authorizations to perform the action that triggered the error.
  System Monitoring: Monitor system performance and resource usage to identify any bottlenecks or issues that may be affecting communication.
  Contact SAP Support: If the issue persists, gather relevant logs and information, and contact SAP support for further assistance. They may require specific details about the error and the context in which it occurred.
  
  Related Information:
  
  SAP Notes: Always check for specific SAP Notes related to STEP021 or SAP_COMM errors, as they may provide targeted solutions or workarounds.
  Transaction Codes: Use transaction codes like SM21 (System Log), ST22 (Dump Analysis), and SM37 (Job Monitoring) to gather more information about the error context.
  Documentation: Review SAP documentation for the specific module or functionality you are working with, as it may contain troubleshooting steps or best practices.
  
  In summary, the STEP021 error is a communication-related issue in SAP that can stem from various causes. Addressing it typically involves checking configurations, network settings, and user authorizations, as well as consulting SAP support for more complex issues.