How To Fix UA_SM1019 - Type name &1 contains invalid characters

UA_SM1019 - Overview

• Message type: E = Error

• Message class: UA_SM1 - Structure Maintenance

• Message number: 019

• Message text: Type name &1 contains invalid characters

What causes this issue?

The type name you selected contains at least one invalid character. For
technical reasons, type names can only contain characters from the
following groups:
Letters (A-Z)
Digits (0-9) and
Special characters: Underscore "_" and slash "/".

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?

Change the type names so that all characters are contained in the
quantity of valid characters.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

UA_SM1019 - Details

• The SAP error message UA_SM1019, which states "Type name &1 contains invalid characters," typically occurs when you are trying to create or modify a type (such as a data type, structure, or table type) in the ABAP Dictionary, and the name you have provided contains characters that are not allowed.
  
  Cause:
  The error is caused by the use of invalid characters in the name of the type you are trying to create or modify. In SAP ABAP, type names must adhere to specific naming conventions, which generally include:
  
  Names must start with a letter (A-Z, a-z).
  Names can contain letters, numbers (0-9), and underscores (_).
  Names cannot contain special characters (e.g., spaces, punctuation marks, etc.).
  Names must not exceed a certain length (typically 30 characters).
  
  
  Solution:
  To resolve this error, you should:
  
  Check the Type Name: Review the name you are trying to use for the type. Ensure that it follows the naming conventions mentioned above.
  Rename the Type: If