My source file for the lines read is located in the same folder as the rest of the files for the project (as you can see, it is included in the files with my attached solution code). I don't understand why it's not finding it. I should be able to access it with a relative path (just the filename). I'd rather not use an absolute path because it seems like bad practice in the long run (you never know if the user is even going to install the software to the same folder or even the same drive letter).