How To Fix WL102 - Parameter error calling binding editor (& <= &)

SAP Error Message - Details

• Message type: E = Error

• Message class: WL - Workflow: run-time messages

• Message number: 102

• Message text: Parameter error calling binding editor (& <= &)

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 WL102 - Parameter error calling binding editor (& <= &) ?

  The SAP error message WL102, which states "Parameter error calling binding editor (& <= &)," typically occurs in the context of SAP Web Application Server (WAS) or when working with Web Dynpro applications. This error indicates that there is an issue with the parameters being passed to a binding editor, which is responsible for managing the data bindings between the UI and the underlying data model.
  Causes:
  
  Incorrect Parameter Types: The parameters being passed to the binding editor may not match the expected types. For example, if a string is expected but an integer is provided, this can lead to a parameter error.
  Missing Parameters: Required parameters may be missing from the call to the binding editor.
  Configuration Issues: There may be issues in the configuration of the Web Dynpro component or the data model that lead to incorrect bindings.
  Version Mismatch: If there are discrepancies between the versions of the components or libraries being used, it can lead to binding errors.
  Data Model Changes: Changes in the underlying data model that are not reflected in the UI bindings can cause this error.
  
  Solutions:
  
  Check Parameter Types: Review the parameters being passed to the binding editor and ensure they match the expected types. Make necessary adjustments to the data types.
  Verify Required Parameters: Ensure that all required parameters are being passed to the binding editor. Check the documentation for the binding editor to confirm which parameters are necessary.
  Review Configuration: Check the configuration of the Web Dynpro component and the data model. Ensure that all bindings are correctly set up and that there are no discrepancies.
  Update Components: If there is a version mismatch, consider updating the components or libraries to ensure compatibility.
  Debugging: Use debugging tools to trace the execution flow and identify where the parameter error is occurring. This can help pinpoint the exact cause of the issue.
  Consult Documentation: Refer to SAP documentation or community forums for additional insights and solutions related to the specific context in which the error occurs.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions for common errors.
  Web Dynpro Documentation: Review the official SAP documentation for Web Dynpro to understand the binding editor's expected parameters and usage.
  Community Forums: Engage with the SAP community forums or SAP support for additional help and shared experiences from other users who may have encountered the same error.
  
  If the issue persists after trying the above solutions, it may be beneficial to reach out to SAP support for further assistance.