How To Fix 37620 - I/O template must begin with an underscore. First character replaced

SAP Error Message - Details

• Message type: E = Error

• Message class: 37 - Screen Painter

• Message number: 620

• Message text: I/O template must begin with an underscore. First character replaced

What causes this issue?

The template of the input/output field does not begin with an
underscore ("_").

System Response

The first character of the template is replaced with an underscore.

How to fix this error?

Check the contents of the string. The template of an input/output field
on a screen may only consist of underscores. At runtime, this is
replaced with a suitable template (for example, for entering a date).

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 37620 - I/O template must begin with an underscore. First character replaced ?

  The SAP error message "37620 I/O template must begin with an underscore. First character replaced" typically occurs when you are trying to create or use an I/O template in SAP that does not adhere to the naming conventions required by the system. Specifically, the error indicates that the first character of the I/O template name must be an underscore (_).
  Cause:
  
  Naming Convention Violation: The I/O template name you provided does not start with an underscore. SAP has specific naming conventions for certain objects, and in this case, the I/O template is one of them.
  User Input Error: The user may have mistakenly entered a name that starts with a letter or number instead of an underscore.
  
  Solution:
  
  Rename the I/O Template: Modify the name of the I/O template to ensure that it starts with an underscore. For example, if your original template name was Template1, change it to _Template1.
  Check for Other Naming Rules: Ensure that the rest of the name follows any other naming conventions that SAP may have (e.g., length, allowed characters).
  Recreate the Template: If renaming is not possible or if the template is already in use, consider creating a new I/O template with the correct naming convention.
  
  Related Information:
  
  SAP Documentation: Refer to the SAP documentation for guidelines on naming conventions for various objects, including I/O templates.
  SAP Notes: Check for any relevant SAP Notes that might provide additional context or updates regarding this error message.
  Testing: After making the changes, test the I/O template to ensure that it functions as expected without triggering the error message again.
  
  By following these steps, you should be able to resolve the error and successfully create or use your I/O template in SAP.