This is the first time that this error has come up. I am using Cygwin with Eclipse 3.5 and my Path variable is set to: %CommonProgramFiles%\\Microsoft Shared\\Windows
Use Process Explorer to take a look at the PATH environment variable inside Eclipse's process. It's possible that it's changing its PATH internally -- if that's the case, you'll need to figure out how to configure Eclipse so that its PATH is set up correctly.
If you're finding that C:\cygwin\bin
isn't in Eclipse's PATH, and you recently added that to your PATH, you need to close and restart Eclipse for that change to take affect.
If you still can't figure it out, try using Process Monitor with a filter for Eclipse.exe to get a long, detailed listing of everything it's trying to do. Look for the call to CreateProcess()
that's failing and see if you can learn anything more.