pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-12333-REELSDCB.ps) >>/Users/jc/w/tmp/Tune-12333-get.log 2>&1" returned status 256
http://dylo.pagesperso-orange.fr/abc/REELSDCB.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-12333-REELSDCB.abc 309 ABC music file with the extracted tune(s)
Tune-12333-REELSDCB.ps 34138 PostScript
Tune-12333-REELSDCB.txt 309 Plain-text file with the extracted tune(s)
Tune-12333-get.log 4184 Log file, useful mostly for debugging
These files should be available for 24 hours.