check

runs abc2abc to check for syntax errors

X:1
T:About these pieces
W:These are transcriptions from a PDF of a book in the National Library of Scotland. published 1649
W:they are intended to be somewhat literal transcriptions with big errors corrected, but some
W:things that are more matters of taste left as is.  Half way between performing and scholarly
W:The accidentals are written in the old style, on each note, and the accidental does not 
W:affect other notes in the bar.

%Warning : Ignoring string 'c' in K: field
K:c

%Error : First K: field must specify key signature
M:4/4