[TheLazySloth]

Try adding the \_ for it is originated for php, meybe it will work if you add an \ before the underscore.

Note: Use the split function.
Example:

pawn Код:

new Name[2][MAX_PLAYER_NAME];
new PlayerName[MAX_PLAYER_NAME];
GetPlayerName(playerid, PlayerName, MAX_PLAYER_NAME);
split(PlayerName, Name, "_");
format(PlayerName, 100, "%s\\_%s", Name[0], Name[1]);