We have a template that creates a virtual file that is named with a serial number.  We want a pop up asking the user if they really should be making this file. ( A reminder basically about what this file is not used for) 

So I created a dispatch that was just yes/ no message box, yes = canceled operation, no = continue,

When I went to test it I got this error when selecting no.  Is this not possible?  Is there a better way to do it?

I was playing with the generate parameter file, but haven't figured it out yet.

Thanks!

Laura