How To Fix CY657 - GANTT chart: function triggered

SAP Error Message - Details

• Message type: E = Error

• Message class: CY - Capacity Requirements Planning

• Message number: 657

• Message text: GANTT chart: function triggered

What causes this issue?

You selected the function "Back" in the Gantt chart.

System Response

You exit the Gantt chart. You return to the screen from which you called
up the Gantt chart.

How to fix this error?

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CY657 - GANTT chart: function triggered ?

  The SAP error message CY657, which states "GANTT chart: function  triggered," typically occurs in the context of using the GANTT chart functionality in SAP Project System (PS) or similar modules. This error can arise when a user attempts to navigate back in the GANTT chart interface, and it may indicate that the system is unable to process the request due to various reasons.
  Possible Causes:
  
  Navigation Issues: The user may have attempted to navigate back to a previous screen or state that is no longer valid or available.
  Session Timeout: The user session may have timed out, leading to an inability to perform further actions.
  Data Integrity Issues: There may be issues with the underlying data that the GANTT chart is trying to display, such as missing or inconsistent project data.
  System Configuration: There may be configuration issues in the SAP system that affect how the GANTT chart functions.
  User Authorizations: The user may not have the necessary authorizations to perform the action they are trying to execute.
  
  Solutions:
  
  Refresh the Screen: Try refreshing the GANTT chart screen or navigating back to the main project screen and then re-accessing the GANTT chart.
  Log Out and Log In: If the session has timed out, logging out and then logging back into the SAP system may resolve the issue.
  Check Data: Verify that the project data is complete and consistent. Look for any missing or incorrect entries in the project structure.
  Review Authorizations: Ensure that the user has the necessary authorizations to access and manipulate the GANTT chart.
  Consult with IT Support: If the issue persists, it may be necessary to consult with your IT support team or SAP Basis team to check for any system configuration issues or to review system logs for more detailed error information.
  
  Related Information:
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message or provide patches and updates.
  Documentation: Review the SAP documentation related to the GANTT chart functionality in the Project System for any known issues or best practices.
  Community Forums: Consider searching or posting in SAP community forums or user groups where other users may have encountered similar issues.
  
  If the problem continues after trying these solutions, it may be beneficial to provide detailed information about the steps leading to the error when seeking further assistance from SAP support or your internal IT team.