pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-56174-makamu2.ps) >>/Users/jc/w/tmp/Tune-56174-get.log 2>&1" returned status 256
http://ifdo.ca/~seymour/runabc/makams/makamu2.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Tune-56174-get.log 11561 Log file, useful mostly for debugging
Tune-56174-makamu2.abc 4365 ABC music file with the extracted tune(s)
Tune-56174-makamu2.ps 75577 PostScript
Tune-56174-makamu2.txt 4365 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.