How To Fix CL758 - Select a function block

SAP Error Message - Details

• Message type: E = Error

• Message class: CL - Classification

• Message number: 758

• Message text: Select a function block

What causes this issue?

The action you selected is for one function block. However, you have
not selected a function block.

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?

Place the cursor on a block that you have created.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CL758 - Select a function block ?

  The SAP error message CL758, which states "Select a function block," typically occurs in the context of SAP's Class Builder or when working with function modules in ABAP. This error indicates that the system expects you to select a function block but none has been selected.
  Cause:
  
  No Function Block Selected: The most common cause is that the user has not selected a function block from the list when prompted.
  Incorrect Navigation: The user may have navigated to a screen or transaction that requires a function block to be selected but did not do so.
  Authorization Issues: In some cases, the user may not have the necessary authorizations to view or select function blocks.
  
  Solution:
  
  Select a Function Block: Ensure that you select a function block from the available list. If you are in a selection screen, look for a dropdown or list of function blocks and choose one.
  Check Navigation: If you are unsure how to navigate to the function block selection, refer to the documentation or help resources for the specific transaction you are using.
  Authorization Check: If you suspect that authorization might be an issue, contact your SAP security administrator to ensure you have the necessary permissions to access the function blocks.
  Restart the Transaction: Sometimes, simply restarting the transaction or the SAP GUI can resolve temporary glitches.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for more details on the specific transaction or function module you are working with.
  SAP Community: The SAP Community forums can be a valuable resource for troubleshooting specific errors, as other users may have encountered and resolved similar issues.
  ABAP Development: If you are a developer, ensure that you are familiar with the ABAP programming environment and how to work with function modules and blocks.
  
  If the issue persists after trying the above solutions, consider reaching out to your SAP support team for further assistance.