How To Fix SWDP_WB_TOOL818 - Contract for controller & is broken

SAP Error Message - Details

• Message type: E = Error

• Message class: SWDP_WB_TOOL - Web Dynpro: Messages for Workbench Tools

• Message number: 818

• Message text: Contract for controller & is broken

What causes this issue?

Contract for controller &v1& is broken.
The metadata of the controller at the time of creating the enhancement
is different from the current (active) metadata state. This could cause
data conflicts.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Using the compare operation, start the version comparison between the
contract and the current version in order to get an overview of the
differences.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SWDP_WB_TOOL818 - Contract for controller & is broken ?

  The SAP error message SWDP_WB_TOOL818 indicates that there is a problem with the contract for a controller in the SAP Web Dynpro application. This error typically arises when the contract between the controller and the view is not properly defined or is broken, which can lead to issues in the application’s functionality.
  Causes:
  
  Missing or Incorrectly Defined Controller: The controller might not be properly defined in the Web Dynpro component.
  Changes in the Interface: If the interface of the controller has been changed (e.g., methods or attributes added/removed) without updating the corresponding views, it can lead to this error.
  Transport Issues: If the component was transported from one system to another, there might be inconsistencies in the transport.
  Version Mismatch: There could be a version mismatch between the controller and the view, especially if they were developed separately.
  
  Solutions:
  
  Check Controller Definition: Ensure that the controller is correctly defined in the Web Dynpro component. Verify that all methods and attributes are correctly implemented.
  Update Views: If there have been changes to the controller, make sure to update the views that reference it. This includes checking the bindings and ensuring they match the current controller definition.
  Rebuild the Component: Sometimes, simply rebuilding the Web Dynpro component can resolve issues. You can do this in the SAP GUI by navigating to the component and using the "Rebuild" option.
  Check Transport Requests: If the issue arose after a transport, check the transport requests to ensure that all necessary objects were included and correctly transported.
  Debugging: Use the debugging tools in SAP to trace the execution and identify where the contract is breaking. This can provide insights into what specifically is causing the issue.
  Consult Documentation: Review the SAP documentation for any specific notes or updates related to the version of SAP you are using, as there may be known issues or patches available.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues related to the error message SWDP_WB_TOOL818. SAP frequently updates their knowledge base with solutions to common problems.
  Web Dynpro Documentation: Familiarize yourself with the Web Dynpro programming model and best practices to avoid similar issues in the future.
  Community Forums: Engage with SAP community forums or support channels where other developers may have encountered and resolved similar issues.
  
  If the problem persists after trying the above solutions, consider reaching out to SAP support for further assistance.