Apple script question

Hi,

That's not a lot to go on!

Can you let us see the full script you have, rather than just one line out of it?

--- Post Merged, Feb 8, 2016 ---

OK, I'm in a good mood so here's something to set you off in the right direction:

Code:

tell application "iTunes"

    --let the user enter the new composer name
   set theNewComposerName to text returned of (display dialog "Enter composer name..." default answer "")

    try
       --try to set the composer and log some details if it fails
       --e.g. because you don't have the right file permission
       set composer of item 1 of selection to theNewComposerName
   on error theError
       --alert the user to the error
       display dialog "Failed to set composer" buttons {"OK"} with icon 0
       --log the details of error
       log theError
  end try

end tell

...have a look in the Scripting Dictionary for iTunes. Note that you can get and set the composer. ;-)