I am trying to get an Excel spreadsheet developed in Windows to work on a Mac. I have included two AppleScriptTasks that check that files exist and send emails. On the Mac on which I'm working, these perform successfully. However on a colleague's Mac, he gets a Run-time error '5 Invalid procedure call or argument' each time. Everything looks similar on both. The only difference I can see is that on my Mac, in System Preferences | Security & Privacy | Automation, the box on the right contains 'Microsoft Excel' and 'System Events' (ticked). Would this be the reason that the AppleScriptTasks won't work? If so, I can't see how to add Excel on his Automation tab. Any thoughts would be appreciated.