First, read this: http://www.mathworks.com/matlabcentral/answers/13205-tutorial-how-to-format-your-question-with-markup
Then,
- I don't use p-files but I believe they are opened/run just by typing their name on the command line. They're encrypted so you may not see anything intelligible if you open them in the text editor/debugger window.
- Put the variable name in single quotes: save(fullFuleName, 'oneVar');
- Use the delete function: delete(fullFileName);
