B.125. TryExec()

Tries to execute a dialplan application.
TryExec(application(arguments))
Tries, like Exec(), to execute a dialplan application, but does not terminate the call if the attempt fails (either because the application does not exist or because it returned an error code). Instead, the channel variable TRYSTATUS is set to one of the following values:
SUCCESS
The application returned 0.
FAILED
The application returned a value other than 0.
NOAPP
The application could not be found.
For more information, see Section B.35, “Exec().