Trouble while saving a new file

Hi everybody,

I've a trouble when I want to save a new file.

Here is the following message:

" Error writing untitled2. /users/myname/Desktop/Filename/..../test.m (No such file or directory) "

I'm not able to find a solution to my problem. The only solution I have is to save the .m on the desktop and then replace it in the correct file. But if I want to open .m located in this file, it won't work.

Could you help me ?

Thks for your precious help