How To Fix SRT_LPREG021 - Proxy class '&1' does not exist

SAP Error Message - Details

• Message type: E = Error

• Message class: SRT_LPREG - Logical Port Registry

• Message number: 021

• Message text: Proxy class '&1' does not exist

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 SRT_LPREG021 - Proxy class '&1' does not exist ?

  The SAP error message SRT_LPREG021 indicates that a proxy class specified in the system does not exist. This error typically occurs in the context of SAP's web services and integration scenarios, particularly when using the SAP NetWeaver Process Integration (PI) or Process Orchestration (PO) components.
  Cause:
  
  Missing Proxy Class: The specified proxy class has not been generated or is missing from the system.
  Incorrect Configuration: The configuration for the web service or proxy might be incorrect, pointing to a non-existent class.
  Transport Issues: If the proxy class was recently transported from another system, it may not have been transported correctly or completely.
  Namespace Issues: The proxy class might exist in a different namespace than expected.
  
  Solution:
  
  
  Check Proxy Generation:
  
  Ensure that the proxy class has been generated correctly. You can do this by navigating to the relevant transaction (e.g., SPROXY) and checking if the proxy class is listed.
  If it is missing, you may need to regenerate the proxy. This can be done by using the SPROXY transaction and selecting the appropriate service.
  
  
  
  Rebuild the Proxy:
  
  If the proxy class is missing, you can rebuild it by going to the SE80 transaction, selecting the appropriate package, and regenerating the proxy.
  
  
  
  Check Configuration:
  
  Verify the configuration settings in the Integration Directory (if using PI/PO) to ensure that the correct proxy class is being referenced.
  Check the service endpoint and ensure it points to the correct proxy.
  
  
  
  Transport Check:
  
  If the proxy class was transported from another system, check the transport logs to ensure that the transport was successful and that all necessary objects were included.
  
  
  
  Namespace Verification:
  
  Ensure that the namespace of the proxy class matches what is expected in the configuration. If there are discrepancies, update the configuration to point to the correct namespace.
  
  
  
  Check for Activation:
  
  Ensure that the proxy class is activated. Sometimes, even if the class exists, it may not be activated, leading to this error.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SPROXY: For managing and generating proxy objects.
  SE80: For accessing the Object Navigator to check and manage ABAP objects.
  SICF: For checking the HTTP services and ensuring they are active.
  
  
  
  Documentation: Refer to SAP Help documentation for more details on web services and proxy generation.
  
  
  SAP Notes: Check for any relevant SAP Notes that might address specific issues related to this error message.
  
  
  If the issue persists after following these steps, consider reaching out to your SAP Basis or development team for further assistance, as they may have more insights into the specific configuration and setup of your SAP environment.