pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6090-10081_Cawdor_Fair.ps) >>/Users/jc/w/tmp/Tune-6090-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ERM/10081_Cawdor_Fair.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-6090-10081_Cawdor_Fair.abc 478 ABC music file with the extracted tune(s)
Tune-6090-10081_Cawdor_Fair.ps 34279 PostScript
Tune-6090-10081_Cawdor_Fair.txt 478 Plain-text file with the extracted tune(s)
Tune-6090-get.log 4492 Log file, useful mostly for debugging
Tune-60900-get.log 5621 Log file, useful mostly for debugging
Tune-60907-Mollroe.abc 342 ABC music file with the extracted tune(s)
Tune-60907-Mollroe.pdf 10195 Portable Data Format
Tune-60907-Mollroe.ps 33379 PostScript
Tune-60907-Mollroe.txt 342 Plain-text file with the extracted tune(s)
Tune-60907-get.log 5395 Log file, useful mostly for debugging
Tune-60908-get.log 5261 Log file, useful mostly for debugging
These files should be available for 24 hours.