I have been using PyCharm happily for a while now but all of a sudden I get an error that it cannot run the Python interpreter from my virtualenv when I start the application: "Invalid Project Interpreter: Cannot run the project interpreter." It also marks all builtin symbols as not being able to be resolved. However, when I use the builtin run command to run the script (in my case a django app) it uses the interpreter I specified and happily runs my script in the virtualenv just as expected.
I already tried clearing the cache, have removed and re-added the interpreter and the python standard lib should be on the interpreter path.
I am running PyCharm 3.0.1 on OS X 10.9 with Python 2.7.5 in virtualenv 1.9.1. If I recall correctly the problem was also present on PyCharm 3.0.0 so I upgraded in hope of fixing the issue.
Would appreciate some help, Googled and read the online docs but found nobody else even mentioning this exact error. Log is attached.