pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-68981-17022-Miss_Campbell_of_Saddells_Strathspey-1.ps) >>/Users/jc/w/tmp/Tune-68981-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/SCD/Book17/17022-Miss_Campbell_of_Saddells_Strathspey-1.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
Form_68981.log 895 Log file, useful mostly for debugging
Tune-68981-17022-Miss_Campbell_of_Saddells_Strathspey-1.abc 810 ABC music file with the extracted tune(s)
Tune-68981-17022-Miss_Campbell_of_Saddells_Strathspey-1.ps 37879 PostScript
Tune-68981-17022-Miss_Campbell_of_Saddells_Strathspey-1.txt 810 Plain-text file with the extracted tune(s)
Tune-68981-get.log 2769630 Log file, useful mostly for debugging
These files should be available for 24 hours.