Does the build.xml file have a target within that will jar up your project files? If so, assuming you've got Ant installed on your computer, go to the directory where the build.xml file is and type: ant [jartarget] Ant assumes that it's going against a build.xml file.
You can certainly use ant to build a jar file ( I know from my experience ). There is probably something else going on with your system, what causes errors. Try to set a small project with one or two files and build jar using them. That will give you an idea on how to use ant to build a jar file.
Actually, in general, an "out of environment space" error usually results from an initial memory setting on the DOS box. For WinME, I changed the initial value from 'Auto' to 4096 this way: (1) Bring up a DOS box (2) Right click on the title bar (3) Select 'Properties' from the drop-down menu(4) Select the 'Memory' tab (5) On the drop-down list for the 'Initial Environment', change that value from 'Auto' to 4096 Now, ever time that you open up a DOS box, your initial memory setting will be 4096. That should take care of any 'Out of environment space' problems. Robert Troshynski