I presume that the lack of an answer along the lines of "just tick this box" to stop the dimension means it's a bug, after all flow arrows don't do it. I haven't had any answer from Intergraph either :-(
The supplemental insulation symbol is simple, standard out of the box, no customization required, way of indicating insulation that we have used for years, unfortunately that was in Autoplant rather than Cadworx. I am trying to only change the way people work and the style of output when required. Both programs use isogen (or used to in Autoplants case) and we were able to copy the styles across from Autoplant to Cadworx with virtually no extra input required, it was awesome. I have since added a few extra "frills" to the cadworx setup as well to make it even better still. Unfortunately it looks like insulation is the exception, it's starting to look like we need to change the way we do it.
I've had a quick look at viloga's post, it is a possibility I might look into, but to be honest I was hoping for a quick easy answer, that one doesn't look quick and easy enough for me :-)
Cheers
Russell