Run in all open docs

Question

I'm trying to run this script  in all open  ID docs but it's only changing only 1 document instead of all . I know is something simple but I can't figure it out. Please advise where am I making the mistake.
tell application "Adobe InDesign CS4"
activate
          repeat with i from 1 to count of documents
                    set myFiles to active document
                    tell myFiles
                              try
                                        try
                                                  set theListOfColors to (every swatch whose model is spot and name begins with "P 555")
                                                  set properties of item 1 of theListOfColors to {model:process, space:CMYK, color value:{0, 0, 0, 100}}
                                        end try
                                        try
                                                  set ListOfColors to (every swatch whose model is process and name begins with "P 555")
                                                  set properties of item 1 of ListOfColors to {model:process, space:CMYK, color value:{0, 0, 0, 100}}
                                        end try
                                        try
                                                  set (model of every color whose model is spot) to process
                                        end try
                              on error the error_message number the error_number
                                        set the error_text to "Error: " & the error_number & ". " & the error_message
  display dialog the error_text buttons {"OK"} default button 1
                                        return the error_text
                              end try
                    end tell
          end repeat
end tell

Answer 1

I'm no AppleScripter, but it seems to me that if you go to the trouble of setting up a variable I to walk through the documents you should use it.
I'd say it's bad form to use "myFiles" as the name for a variable that holds a reference to a single document.
Someone might need to backstop my code, but you should be able to use:
repeat with myDoc in documents
tell myDoc
Dave