As i purchased A8 full and runned trought the Lite-C tutorials, when i reached lesson 119 and played the SCRIPT19.C, the engine crashed, showing the following message:

...
error in line 18:
'ph_setgravity' undeclared identifier
<ph_setgravity (vector(0, 0, -386)); // set the gravity>
..0.065 sec
...

At first, i tought it was something to do with the tutorial, but after reading it, it wasn´t the case.
Trying to fix it, i added in the includes section of the code:

#include <ackphysx.h>

...thinking that this might be a problem related to the version of the script when it was made or something... no dice, same problem.
Strangely, searching the forum produced NO results, so i might be the only one having this problem?
Is there something in the GPU driver that can cause this?
Or the official A8 tutorial is buggy?
Any help is appreciated.