pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-98406-10623_Tempest.ps) >>/Users/jc/w/tmp/Tune-98406-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/EliasHowe/MusiciansCompanionP1/10623_Tempest.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-98406-10623_Tempest.abc 647 ABC music file with the extracted tune(s)
Tune-98406-10623_Tempest.ps 34768 PostScript
Tune-98406-10623_Tempest.txt 647 Plain-text file with the extracted tune(s)
Tune-98406-William_Clarke_MS_1770.abc 159 ABC music file with the extracted tune(s)
Tune-98406-William_Clarke_MS_1770.pdf 2217 Portable Data Format
Tune-98406-William_Clarke_MS_1770.ps 6 PostScript
Tune-98406-William_Clarke_MS_1770.txt 159 Plain-text file with the extracted tune(s)
Tune-98406-get.log 9880 Log file, useful mostly for debugging
These files should be available for 24 hours.