Note TestStand does not validate step type names you create programmatically for invalid characters, such as spaces, which can result in errors when you use them. Use the TypeUsageList.ValidateNewTypeName method to validate step type names. TestStand require step type names to be strings that contain only letters, numbers, and underscores. Step type names cannot contain spaces, start with a number, or be empty. Additionally, the step type name cannot duplicate step type names already in memory.