pscmd="(jcabc2ps /Users/jc/w/tmp/Tune-27789-CaledonianMusicalRepository_1811.abc -F fmt/pdf_55.fmt +s 0.55 +maxs 2000 )>/Users/jc/w/tmp/Tune-27789-CaledonianMusicalRepository_1811.ps 2>>/Users/jc/w/tmp/Tune-27789-get.log" returned status 256.
http://john-chambers.us/~jc/music/book/CaledonianMusicalRepository_1811.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.55 512x512 ]
filesizedescription
Tune-27789-CaledonianMusicalRepository_1811.abc 219279 ABC music file with the extracted tune(s)
Tune-27789-CaledonianMusicalRepository_1811.ps 0 PostScript
Tune-27789-CaledonianMusicalRepository_1811.txt 219279 Plain-text file with the extracted tune(s)
Tune-27789-get.log 78028 Log file, useful mostly for debugging
These files should be available for 24 hours.