0	No errors
1	Error during config file parsing
2	Error during memory allocation
3	Could not open file
4	Error reading file
5	User prompted and choose to exit rather than add a tag
6	Error during move_file
7	idx file eof (shouldn't happen)
8	Tagline file doesn't have \n in the right place
9	Too much recursion
10	Died trapping SIGINT
