Apple

Discussion
Scripting addition commands are handled differently if a script has use commands. If a script has one or more use commands of any kind, scripting addition commands are not available by default. You must explicitly indicate that you wish to use scripting additions, either with a use or using terms from command.
use scripting additions
display dialog "hello world"
using terms from scripting additions
   display dialog "hello world"
end using terms from
If a script uses use scripting additions, AppleScript may optimize scripting addition commands, sending them to the current application instead of the current target (it) when it does not change the meaning to do so. For example, random number does not need to be sent to another application to work correctly, and will always be sent to the current application when imported with use. Without a use scripting additions command, AppleScript must use a less efficient dispatching scheme, so explicitly declaring them is recommended.

References:
	>Compile Error use framework "Foundation" paths (From: John Day <email@hidden>)