pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6044-027_Pussy_Cat_Pussy_Cat.ps) >>/Users/jc/w/tmp/Tune-6044-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EverydaySongBook/027_Pussy_Cat_Pussy_Cat.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-6044-027_Pussy_Cat_Pussy_Cat.abc 712 ABC music file with the extracted tune(s)
Tune-6044-027_Pussy_Cat_Pussy_Cat.ps 33910 PostScript
Tune-6044-027_Pussy_Cat_Pussy_Cat.txt 712 Plain-text file with the extracted tune(s)
Tune-6044-get.log 4775 Log file, useful mostly for debugging
Tune-60441-CJ40.abc 2760 ABC music file with the extracted tune(s)
Tune-60441-CJ40.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-60441-CJ40.ps 50883 PostScript
Tune-60441-CJ40.txt 2760 Plain-text file with the extracted tune(s)
Tune-60441-get.log 5159 Log file, useful mostly for debugging
These files should be available for 24 hours.