pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-48138-FlowersOfConn.ps) >>/Users/jc/w/tmp/Tune-48138-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/Scotland/FlowersOfConn.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-48138-FlowersOfConn.abc 2129 ABC music file with the extracted tune(s)
Tune-48138-FlowersOfConn.ps 49834 PostScript
Tune-48138-FlowersOfConn.txt 2129 Plain-text file with the extracted tune(s)
Tune-48138-get.log 4926 Log file, useful mostly for debugging
These files should be available for 24 hours.