[Mike 1948]

I don't have that in my file. Here is a partial output of what I have in the file.

N0000 (Filename: crossTHCPost.tap)
N0010 (Post processor: MP1000-THC.scpost)
N0020 (Date: 17/02/2010)
N0030 G20 (Units: Inches)
N0040 G53 G90 G40

N0240 M05

What you showed was the output from your post processor. Look at the N0010 line. Your post processor is the MP-1000-thc.scpost. The post is found in the program files folder under Sheetcam, posts. Open it with notepad and and change the refdistance to 99999 also.
I opened the post on my machine and it looked like this:

dist = 9999999
refdistance = 99999* scale
--Put your switch offset value here
switchoffset =.052
lastz = 0
end.

This is also where you set the switchoffset(from earlier post) for your cut height. Change the .052 number to correspond to your needs.

Good luck
Mike