InstallMate sets this variable to the installer's current status, which is one of the following values:
|-2||Session is cancelled by the user|
|-1||Session failed due to an error|
|0||Session not started yet|
|1||Session is in progress|
|2||Session completed successfully|
You can refer to this variable as <TsuStatus>. In conditional expressions you can omit the brackets and use tests like TsuStatus < 0 to test for a failed installation session. Set and updated by the installer.