Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/CPC/SkillernChalloner_PCD1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8634-SkillernChalloner_PCD1.ps) >>/Users/jc/w/tmp/Tune-8634-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/CPC/SkillernChalloner_PCD1.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Find_86345.log 1777 Log file, useful mostly for debugging
Tune-8634-SkillernChalloner_PCD1.abc 158 ABC music file with the extracted tune(s)
Tune-8634-SkillernChalloner_PCD1.ps 6 PostScript
Tune-8634-SkillernChalloner_PCD1.txt 158 Plain-text file with the extracted tune(s)
Tune-8634-get.log 4308 Log file, useful mostly for debugging
Tune-86343-Goulding_SSEIFA.abc 154 ABC music file with the extracted tune(s)
Tune-86343-Goulding_SSEIFA.pdf 2217 Portable Data Format
Tune-86343-Goulding_SSEIFA.ps 6 PostScript
Tune-86343-Goulding_SSEIFA.txt 154 Plain-text file with the extracted tune(s)
Tune-86343-get.log 5041 Log file, useful mostly for debugging
These files should be available for 24 hours.