Preventing Special Character for Custom Prompts

To create Custom Prompts for a possible drawing go to Diagrams Options / Attribute Presentation / Equipment.

With special character (@,$,~,*) in custom prompts restricts user from going ahead with changes, text box color will change and after ok button it will show the message "Special Characters(@,$,~,*)" untill valid value is set.

Use special characters (@,$,~,*) in custom prompts to prevents changes. Using these will change the Text box colour