pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-16415-Waltz_Tamo_Daleko-Gm,Am-40-4.ps) >>/Users/jc/w/tmp/Tune-16415-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/session/waltz/Waltz_Tamo_Daleko-Gm,Am-40-4.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.65 512x512 PNG]
filesizedescription
Tune-16415-Waltz_Tamo_Daleko-Gm,Am-40-4.abc 2498 ABC music file with the extracted tune(s)
Tune-16415-Waltz_Tamo_Daleko-Gm,Am-40-4.ps 40993 PostScript
Tune-16415-Waltz_Tamo_Daleko-Gm,Am-40-4.txt 2498 Plain-text file with the extracted tune(s)
Tune-16415-get.log 8324 Log file, useful mostly for debugging
These files should be available for 24 hours.