How To Fix SPXN170 - Only one implementation object may be assigned per communication type

SAP Error Message - Details

• Message type: E = Error

• Message class: SPXN - Proxy Generation

• Message number: 170

• Message text: Only one implementation object may be assigned per communication type

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 SPXN170 - Only one implementation object may be assigned per communication type ?

  The SAP error message SPXN170, which states "Only one implementation object may be assigned per communication type," typically occurs in the context of SAP's Business Process Management (BPM) or when configuring communication types in the SAP system. This error indicates that there is an attempt to assign multiple implementation objects to a single communication type, which is not allowed.
  Cause:
  
  Multiple Assignments: The primary cause of this error is that there are multiple implementation objects (like function modules, classes, or methods) assigned to the same communication type in the configuration.
  Configuration Error: It may arise from incorrect configuration settings in the SAP system, where the same communication type is mistakenly linked to more than one implementation object.
  
  Solution:
  To resolve the SPXN170 error, follow these steps:
  
  
  Check Communication Type Configuration:
  
  Navigate to the relevant configuration area in SAP where communication types are defined (e.g., transaction SPRO).
  Look for the specific communication type that is causing the error.
  
  
  
  Review Assigned Implementation Objects:
  
  Check the list of implementation objects assigned to the communication type.
  Ensure that only one implementation object is assigned to that communication type. If there are multiple, you will need to remove the duplicates.
  
  
  
  Adjust Assignments:
  
  If you find multiple assignments, decide which implementation object should remain and remove the others.
  Save your changes and exit the configuration.
  
  
  
  Test the Configuration:
  
  After making the necessary adjustments, test the communication type to ensure that the error no longer occurs.
  
  
  
  Documentation and Notes:
  
  Document any changes made for future reference.
  If the issue persists, consider checking SAP Notes or consulting SAP support for further assistance.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might provide additional insights or updates related to this error.
  Transaction Codes: Familiarize yourself with transaction codes like SPRO (for configuration) and SE80 (for object management) that can help in navigating the system.
  BPM and Communication Types: Understanding the role of BPM and how communication types are configured in SAP can provide better context for troubleshooting similar issues in the future.
  
  By following these steps, you should be able to resolve the SPXN170 error and ensure that your communication types are correctly configured in SAP.