pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9492-SCAJMR_1784-V1.ps) >>/Users/jc/w/tmp/Tune-9492-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Stewart/SCAJMR_1784-V1.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
Coll_94923.log 134942 Log file, useful mostly for debugging
Coll_94924.log 261969 Log file, useful mostly for debugging
Find_94925.log 1523 Log file, useful mostly for debugging
Form_94923.log 862 Log file, useful mostly for debugging
Tune-9492-SCAJMR_1784-V1.abc 436 ABC music file with the extracted tune(s)
Tune-9492-SCAJMR_1784-V1.ps 34056 PostScript
Tune-9492-SCAJMR_1784-V1.txt 436 Plain-text file with the extracted tune(s)
Tune-9492-get.log 4370 Log file, useful mostly for debugging
Tune-94921-get.log 1357 Log file, useful mostly for debugging
Tune-94924-get.log 5222 Log file, useful mostly for debugging
Tune-94925-get.log 3205 Log file, useful mostly for debugging
Tune-94929-get.log 6727 Log file, useful mostly for debugging
These files should be available for 24 hours.