How do I reset a user-created environment variable to be empty?

[Anonymous]

I have created an environment variable called "SUFFIX", and assigned it the value "PSI", using the following command sequence:

setenv<enter>SUFFIX<enter>PSI<enter>

It works fine for what I'm doing (a toolbar button macro using DIESEL in AutoCAD LT 2011), but now I want to set the variable SUFFIX to be empty: not a space, not anything at all. I can't figure out a keyboard input that will do that.

Any suggestions? Thanks in advance.    

P.S. Perhaps there is an AutoCAD variable that consists of a null string? If so, I could "$M=" to get that null value and place it in SUFFIX.

[pendean]

Not sure you can, you have to enter something. may I ask where you use this and how, and why you need a blank entry for it (wouldn't you just not use the macro)? there might be other options.

[vmichl_cs]

You can reset the variable using REGEDIT. See:

http://www.cadforum.cz/cadforum_en/how-to-delete-reset-a-variable-set-by-setenv-tip8662

Vladimir Michl, www.cadstudio.cz

[pendean]

An excellent tip for occasional use but I would hesitate to recommend a frequent or a constant Windows Registry edit (based solely on the OP's intended use as noted above).

My 2cents worth.

[Anonymous]

Thanks for all the responses.