How To Fix 37851 - Invalid element for table control (conversion not possible)

SAP Error Message - Details

• Message type: E = Error

• Message class: 37 - Screen Painter

• Message number: 851

• Message text: Invalid element for table control (conversion not possible)

What causes this issue?

The step loop contains an element that is not allowed in a table
control.

System Response

The step loop cannot be converted into a table control.

How to fix this error?

Check the elements in the step loop and either remove or convert the
ones that are not allowed in a table control. The following elements
are currently allowed:
As a title element:
Static texts and dynamic output fields;
As a column element:
Texts
Input/output fields (including dropdown list boxes)
Checkboxes and radio buttons (without text: if necessary, create the
texts separately in the title area)
Pushbuttons.

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 37851 - Invalid element for table control (conversion not possible) ?

  The SAP error message 37851, "Invalid element for table control (conversion not possible)," typically occurs in the context of SAP GUI programming, particularly when dealing with table controls in screen programming (dynpro). This error indicates that there is an issue with the data being processed in a table control, often related to the data type or structure of the elements being used.
  Causes:
  
  Data Type Mismatch: The data type of the field being used in the table control does not match the expected type. For example, if a numeric field is expected but a character field is provided, this can lead to conversion issues.
  Field Definition Issues: The field definitions in the table control may not be correctly set up, leading to invalid references.
  Incorrect Field Assignment: If the fields in the table control are not correctly assigned to the corresponding data elements in the program, it can cause this error.
  Screen Field Attributes: The attributes of the screen fields (like length, type, etc.) may not be compatible with the data being processed.
  
  Solutions:
  
  Check Data Types: Ensure that the data types of the fields in the table control match the expected types. You can do this by reviewing the data dictionary definitions for the fields involved.
  Review Field Assignments: Verify that all fields in the table control are correctly assigned to the corresponding data elements in your ABAP program. Make sure that the field names and types match.
  Adjust Field Attributes: If necessary, adjust the attributes of the fields in the table control to ensure they are compatible with the data being processed.
  Debugging: Use the debugger to step through the code and identify where the conversion is failing. This can help pinpoint the exact field or data causing the issue.
  Check for Empty Values: Sometimes, empty or null values can cause conversion issues. Ensure that the data being processed is valid and not empty.
  
  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 to common problems.
  Documentation: Review the SAP documentation for table controls and screen programming to ensure that you are following best practices.
  Community Forums: Consider searching or posting on SAP community forums or platforms like SAP Community, Stack Overflow, or other ABAP-related forums for additional insights and solutions from other developers who may have encountered the same issue.
  
  By following these steps, you should be able to identify and resolve the cause of the SAP error message 37851.