Show missmatch if zoo load fails

[flomock]

would be nice to simply print the number of the row and the string of the mismatch itself.
Right now:

Loading data from NCBI.
Batch size: 5000
Starting download:
Progress:  [::..................................]  20000/248986  0d 00:34:45
Mismatch btw/ selected database and accession IDs.
Aborted!

possible new example:

Loading data from NCBI.
Batch size: 5000
Starting download:
Progress:  [::..................................]  20000/248986  0d 00:34:45
Mismatch accession IDs.
Position: 20589
ID: KJ568109*
Aborted!