What is the full error message?
What is the exact version of Audacity (look in “Help > About Audacity”)
Does the project play correctly all the way through?
Also, this is a family friendly site, so please keep the language appropriate for that.
I cannot convert my audio files. Upon the attempt to export to mp3, I get my two dialog windows as where to save, and the metadata tags (artist name, etc.), and upon hitting ok I get a small window that pops up that says…
File Error
"Audacity failed to read from a file in :.
Is the Audacity project a recording, or is it an imported file?
Has the project been saved? If so, what is the full file name and path (the name including the directory).
Doe the Audacity project play?
My guess is that you are using an invalid file name somewhere.
The full specification for valid file names on Windows is here: https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247(v=vs.85).aspx but the short version (which works for all platforms) is to only use the characters 0-9, a-z, A-Z, space, underscore.