Path issues in AppleScript using 'Do shell script'

[Zenoah]

Hi,

I'm creating an app on the Mac that uses Applescript and ImageMagick to convert PDF files. At the moment I am using the Terminal to execute the commands like so from within AppleScript, which works :-

tell application "Terminal"
if not (exists front window) then do script ""
do script "convert " & home_path_posix & longName & "'(Black)'.tif -compress lzw -depth 8 -colorspace Gray separated-Black.tif" in front window
repeat
tell application "Terminal" to set BI_ to busy of front window
delay 1
if BI_ is false then exit repeat
end repeat
end tell

From what i've read though a better way to go is 'do shell script' so the Terminal window doesn't get invoked and also so I can port it over to Xcode. I have tried converting the command to this :-

tell application "System Events"
do shell script "usr/local/bin/convert " & home_path_posix & longName & "'(Black)'.tif -compress lzw -depth 8 -colorspace Gray " & home_path_posix & "separated-Black.tif"
end tell

The problem with the 'do shell script' version though is i'm having trouble with paths with the input/output file paths failing. See the error below :-

convert: no decode delegate for this image format `/Users/ant/p001(Black).tif' @ error/constitute.c/ReadImage/552.
convert: no images defined `/Users/ant/separated-Black.tif' @ error/convert.c/ConvertImageCommand/3127." number 1

I'm presuming the error is because of filename path issues.

Anyone able to help with this?

Thanks,
Anthony

[fmw42]

do script "convert " & home_path_posix & longName & "'(Black)'.tif -compress lzw -depth 8 -colorspace Gray separated-Black.tif" in front window

Applescript will not know where IM resides. Put the full path to convert.

try

type -a convert

to see where IM is installed. Typically either /usr/bin/convert or /usr/local/bin/convert