Error Check for reading from text files

[FalconPAwnch]

In the program I am making, the user inputs the filename of the text file that they would like to open. If this file does not exist, the program instantly crashes. Is it possible to make some sort of error check to see if the file exists or not before trying to open it? Thanks in advance.

[HeavenAgain]

code:

var pathName : string         var choice : string         loop             put "Enter file name to write results to" ..             get pathName             if File.Exists (pathName) then                 put "Overwrite ", pathName, "?" ..                 get choice                 exit when choice = "y"             else                 exit             end if         end loop

from F10 turing help

[FalconPAwnch]

That's from the F10 Turing help? Wow do I feel stupid. Thanks a bunch though dude, you may have just saved my life.