Create a calendar event with an attached file?

Hi, I've been trying to create an event with an attached file (a pdf in my case). At the moment I would have the following:

set NewEvent to make new event with properties {summary:"OR", start date:Dia, end date:Dia_fin, }

I need the property which would be followed by the file route, I have tried with url but it obviously doesn't work.

Thank you very much.

Sorry, I will put the complete script here. I think this way you can better understand my question:

tell application "FileMaker Pro"
	activate
	set theStartDate to field "Fecha intervencion" of current record
end tell
set theEndDate to theStartDate
set DateStart_text to date theStartDate
set DateEnd_text to date theEndDate
set HoraStart_Text to 0
set HoraEnd_Text to 0
set Dia_Txt to (DateStart_text & " " & HoraStart_Text) as string
set Dia to date Dia_Txt
set Dia_Fin_Txt to (DateEnd_text & " " & HoraEnd_Text) as string
set Dia_Fin to date Dia_Fin_Txt
set v_Desc to "Varices láser MID. asisa. Doy todo."
set v_Summary to "PROBANDO PRUEBA PROBAR"
set v_Desc_text to v_Desc as string
set v_Summary_text to v_Summary as string
set theStartDate_text to date theStartDate
set theEndDate_text to date theEndDate
**set Thefile to "/Users/sergio/Desktop/Temporal FMK/Prueba Probar , Probando.pdf"**
tell application "Calendar"
	tell calendar "trabajo sergi"
		set NewEvent to make new event with properties {summary:"QUIRÓFANO", start date:Dia + 9 * hours + 30 * minutes, end date:Dia_Fin + 9 * hours + 30 * minutes + 90 * minutes, **url:POSIX file Thefile}**
		set IDEVENTO to uid of NewEvent
	end tell
	reload calendars
end tell

Thank You again

Create a calendar event with an attached file?
 
 
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