How to display error message for special character(!) in clispec

I am using clispec for rendering my command and I am able to render my command.

when I issue special character (! ) along with my command,it is not displaying any error message and instead of my command getting executed.

case 1:
show AA BB !@## // it is displaying output for this command.

case 2:
show AA BB @#%% // getting Error (“unknown argument” )

please suggest some way to display error message from CLI.

Your question can be best addressed by filing a RT ticket with our support team.

You can refer to Chapter 16.13 of the ConfD User Guide for more information regarding your issue.