pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6410-20911_Light_As_Thistledown.ps) >>/Users/jc/w/tmp/Tune-6410-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ERM/20911_Light_As_Thistledown.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-6410-20911_Light_As_Thistledown.abc 630 ABC music file with the extracted tune(s)
Tune-6410-20911_Light_As_Thistledown.ps 34203 PostScript
Tune-6410-20911_Light_As_Thistledown.txt 630 Plain-text file with the extracted tune(s)
Tune-6410-get.log 4737 Log file, useful mostly for debugging
Tune-64108-10473_Brose_and_Butter-001.svg 12186 Scalable Vector Graphics format
Tune-64108-10473_Brose_and_Butter.abc 460 ABC music file with the extracted tune(s)
Tune-64108-10473_Brose_and_Butter.txt 460 Plain-text file with the extracted tune(s)
Tune-64108-get.log 4267 Log file, useful mostly for debugging
These files should be available for 24 hours.