PyCharm asks for python interpreter every time project is loaded

Rather frustratingly, every time I load up an existing project or create a new one – it complains there is no interpreter selected and I have to provide the path to it.

There is nothing unusual about my python installation, it’s sat in C:/Python27/ as you would expect. It always used to work, but the last few weeks something has changed.

I’m running Win7. PATH system variable points to C:/Python27/ as it ought to.

If I crack open commandline, the python command opens as it ought to.

Any ideas?

Answer

Setting the IDE default interpreter fixed the problem, as Vadim mentioned. Found instructions on how to do that here.

File | Default Settings | Project Interpreter.

This configuration sets the default interpreter for the new projects, note the Default Settings menu, it’s not the same as File | Settings which sets options for the current project.

Not entirely sure why the default was unset, but at least now I can set it back again. The project default setting was being forgotten as well which is curious, but a problem for another day.