I have been using the ExpressTool breakline command and when I run the command and I want the size to be 2/dimscale and I want the extension to be 1/dimscale. The only way that I have been able to do this is by typing it in manually. For example if my dimscale is 360 when it asks for breakline size I enter 2/360. I have tried going in through the CUI editor and editing the macro to
^C^Cbreakline;s;(/ 2 (getvar "dimscale"));e;(/ 2 (getvar "dimscale")); but when I then run it it stops at the size question and says that it must be a number or 2 points.

Can anyone help?

Thanks,