pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-69351-20791_Harrison_Sett_tune_4.ps) >>/Users/jc/w/tmp/Tune-69351-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/EliasHowe/MusiciansCompanionP2/20791_Harrison_Sett_tune_4.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.65 512x512 PNG]
filesizedescription
Tune-69351-20791_Harrison_Sett_tune_4.abc 920 ABC music file with the extracted tune(s)
Tune-69351-20791_Harrison_Sett_tune_4.ps 34770 PostScript
Tune-69351-20791_Harrison_Sett_tune_4.txt 920 Plain-text file with the extracted tune(s)
Tune-69351-24CountryDances_1796_Preston.abc 165 ABC music file with the extracted tune(s)
Tune-69351-24CountryDances_1796_Preston.pdf 2217 Portable Data Format
Tune-69351-24CountryDances_1796_Preston.ps 6 PostScript
Tune-69351-24CountryDances_1796_Preston.txt 165 Plain-text file with the extracted tune(s)
Tune-69351-get.log 16338 Log file, useful mostly for debugging
These files should be available for 24 hours.