CreateProcess error=87, The parameter is incorrect

I received this error as well, but for different cases than what is listed. I get this when attempting to execute JUnit tests in an Eclipse project whose workspace path is too long; moving the project to a shorter path resolved this issue.

Cannot run program "C:\Program Files\Java\jdk1.6.0_26\jre\bin\java.exe": (Long Project Path Path)Error: CreateProcess error=87, The parameter is incorrect

In my case, removing duplicate jars solved the problem.