pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-90687-30521_Scotch_Reel_No_1.ps) >>/Users/jc/w/tmp/Tune-90687-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EliasHowe/MusiciansCompanionP3/30521_Scotch_Reel_No_1.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-90687-017_Major_Shanly.abc 1184 ABC music file with the extracted tune(s)
Tune-90687-017_Major_Shanly.pdf 25476 Portable Data Format
Tune-90687-017_Major_Shanly.ps 39586 PostScript
Tune-90687-017_Major_Shanly.txt 1184 Plain-text file with the extracted tune(s)
Tune-90687-30521_Scotch_Reel_No_1.abc 726 ABC music file with the extracted tune(s)
Tune-90687-30521_Scotch_Reel_No_1.ps 35163 PostScript
Tune-90687-30521_Scotch_Reel_No_1.txt 726 Plain-text file with the extracted tune(s)
Tune-90687-get.log 10436 Log file, useful mostly for debugging
These files should be available for 24 hours.