I found the following... - Set up a shortcut to invoke your program - Right click on the shortcut - Click on Properties - Click the memory tab - In there you will see a value for initial environment. It may be Auto. Make it 4096 or whatever the max is. I have often found problems with Auto. - Click on apply Also set up the shortcut not to close on exit so you can see any errors. Now try running your program using the shortcut. If you want to run your program from the command line for whatever reason, set up your shortcut to point to c:\windows\system32\command.com instead of cmd.exe and then you will have the memory tab available as above. You could also accomplish this by editing the comspec environment variable and adding a /e:#### parameter, but that would apply to all DOS windows, which may not be desirable. Having said all this, I will be surprised if it helps because it is really unusual to have to allocate a larger environment. It may be a linking, overlay or memory allocation problem. John W. ----- Original Message ----- From: "Tim Wegner" <twegner@swbell.net> To: <Fractint@mailman.xmission.com> Sent: Saturday, July 29, 2006 2:17 PM Subject: [Fractint] environment space for Fractint under XP I received this plea for help. Does anyone have a good answer? <quote> I have been unable to get fractint to run on my XP Pro SP2 computer in a Command Prompt session. I keep getting the error R6009 not enough space for environment. I have tried several things like setting CommandEnvSize=2424 environment variable, to no avail. </quote>