Applescript Issue with Mavericks: Security?

Question

Hi - I'm having an Applescript Problem with Mavericks:
For years, I've been running EyeTV on my mac. After recording a TV show, EyeTV calls a script called "RecordingDone.scpt".
I've modified this script to do what I need it to do. It's automatically run by EyeTV (using a process called "TriggeredScriptBridge", which I can observe via Activity Monitor). I can also execute the script directly from the Finder, as an Applescript app, and also by running the script via Applescript Editor.
Prior to Mavericks, both EyeTV and manual execution of the script ran correctly.
With Mavericks, running the script executes correctly when run manually. But whenever EyeTV executes the script, it fails. The failure occurs when the script tries to create a new folder or copy a file.
For example, this code runs correctly when initiated manually but fails when initiated by EyeTV:
  if (exists folder fileLocation) is false then
  try
      make new folder at alias ExportLocationTV with properties {name:ParsTitle}
            my log_event("DEBUG:  Folder successfully created")
  on error
        my log_event("DEBUG:  couldn't make folder!")
  end try
  end if
Same thing with this code (manual execution works, not so when called by EyeTV):
try
      do shell script shellCommand -- do the copy
  my log_event("DEBUG:  copied successfully")
  on error
       my log_event("DEBUG:  failed to copy!")
  end try
My guess is that Mavericks isn't letting EyeTV call a script that writes to disk. Is that what's happening? If so, how do I make things work again? Or if I'm wrong with my guess, anybody have any idea what might be screwing up here?
Thanks much....

Answer 1

If this application is from the App Store, it is running in a sandbox and needs to have the proper entitlements. 
No, the app is not from the App Store. But perhaps the developers have incorporated sandboxed operation in a recent update? (I don't know much about sandboxing and its effects yet...)
I am guessing that since scripts are supported by the application that the developers have set the appropriate entitlement for that, but the user running the application will still need to authorize writing to a location outside of the sandbox.
Your script is not using a security-scoped bookmark or putting up a file dialog - how are you selecting the destination folder?
OK, some of this is new to me (e.g. security-scoped bookmark), so please bear with me if my responses don't make immediate sense.
The EyeTV app developers have put a few calls to external scripts that can be run when certain events occur within the app (for example, "RecordingStarted.scpt" and "RecordingDone.scpt"). The EyeTV app initiates a process named "TriggeredScriptBridge" that calls the scripts. These scripts are intended to be modified by users to perform tasks upon the TV recording created by EyeTV. They have always worked fine before Mavericks.
Under Mavericks, when the script is run via a call from the EyeTV app, the destination folder(s) are selected by hard-coded links I placed within the script. When I run the script manually, I present a Choose Folder dialog for more flexibility.
So, under Mavericks, do I need to do something different in my scripts to allow access to the disk to create folders, etc.? Or is this something that I can't do because it's the responsibility of the app itself (EyeTV)? Or am I not understanding what's going on here (the most likely scenario... )