Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1812/CharlesZeuner_TremontQuadrilles1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3656-CharlesZeuner_TremontQuadrilles1.ps) >>/Users/jc/w/tmp/Tune-3656-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1812/CharlesZeuner_TremontQuadrilles1.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_36566.log 277810 Log file, useful mostly for debugging
Coll_36569.log 291809 Log file, useful mostly for debugging
Tune-3656-2100_Niel_Gows_Recovery-001.svg 21917 Scalable Vector Graphics format
Tune-3656-2100_Niel_Gows_Recovery.abc 544 ABC music file with the extracted tune(s)
Tune-3656-2100_Niel_Gows_Recovery.txt 544 Plain-text file with the extracted tune(s)
Tune-3656-CharlesZeuner_TremontQuadrilles1.abc 169 ABC music file with the extracted tune(s)
Tune-3656-CharlesZeuner_TremontQuadrilles1.ps 6 PostScript
Tune-3656-CharlesZeuner_TremontQuadrilles1.txt 169 Plain-text file with the extracted tune(s)
Tune-3656-get.log 13550 Log file, useful mostly for debugging
Tune-36564-24CountryDances_1798_Bland_Weller.abc 170 ABC music file with the extracted tune(s)
Tune-36564-24CountryDances_1798_Bland_Weller.pdf 2217 Portable Data Format
Tune-36564-24CountryDances_1798_Bland_Weller.ps 6 PostScript
Tune-36564-24CountryDances_1798_Bland_Weller.txt 170 Plain-text file with the extracted tune(s)
Tune-36564-get.log 5551 Log file, useful mostly for debugging
Tune-36566-24CountryDances_1799_Preston.abc 165 ABC music file with the extracted tune(s)
Tune-36566-24CountryDances_1799_Preston.pdf 2217 Portable Data Format
Tune-36566-24CountryDances_1799_Preston.ps 6 PostScript
Tune-36566-24CountryDances_1799_Preston.txt 165 Plain-text file with the extracted tune(s)
Tune-36566-get.log 5406 Log file, useful mostly for debugging
These files should be available for 24 hours.