[Basicz]

Lol this is funny!

pawn Code:

#include    < a_samp > // SetPlayerPos is defined on a_players.inc, which it is included in a_samp

#if !defined SetPlayerPos // If it's not defined
    #error "ROFLMAO!!!" // Instruct the compiler to make an error.
#else // Else
    #undef SetPlayerPos // Undefine it, error in this line.
#endif

Or just :

pawn Code:

#include < a_samp >

#undef SetPlayerPos // Error, SetPlayerPos is not defined =)

Got the same error, didn't even used SetPlayerPos.

My brains got confused ...