Mismatch: X:1 doesn't match requested X:2
X:2 not found in http://john-chambers.us/~jc/music/book/CaledonianMusicalRepository/Bonny_Dundee_1806.abc
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-69158-Bonny_Dundee_1806.ps) >>/Users/jc/w/tmp/Tune-69158-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/CaledonianMusicalRepository/Bonny_Dundee_1806.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Tune-69158-Bonny_Dundee_1806.abc 0 ABC music file with the extracted tune(s)
Tune-69158-Bonny_Dundee_1806.ps 6 PostScript
Tune-69158-Bonny_Dundee_1806.txt 0 Plain-text file with the extracted tune(s)
Tune-69158-get.log 4967 Log file, useful mostly for debugging
These files should be available for 24 hours.