my monodevelop didn’t open when i tried to open a script so i installed monodevelop standalone from this link
http://monodevelop.com/
i edited the settings of unity and set the external script editor the standalone monodevelop when i tried to open it this message showed up
i didn’t want to change anything else in the settings so that the program won’t crash
note
i am using unity 3.4 and i did’t upgrade to 3.5
i hope someone has the solution for this problem and thank you