[Scottylad]

Solved - Thank you!

[jlalt]

PHP код:

new nxtlevel = PlayerInfo[MAX_PLAYERS][pLevel]+1; --------------- Error is here. 


instead of MAX_PLAYERS you should use playerid O.O

PHP код:

new nxtlevel = PlayerInfo[playerid][pLevel]+1; --------------- Error is here. 


[ATGOggy]

Change that line to:
new nxtlevel = PlayerInfo[playerid][pLevel]+1;

It happened because MAX_PLAYERS is equal to 500. And you created this variable with 500 cells(or whatever u can call it). So the id of those cells are 0,1,2,....499. And there is no cell called 500 so when u tried to get the 500th cell, which does not exist, you got this error.

[Scottylad]

Thanks it worked+1 I didnt see that haha.