[Daniel-92]

Probб de esta forma, puede ser que se confundan las ids.

pawn Код:

//En OnPlayerConnect
TextoP[playerid] = Text3D:-1;


//En el dialog response-----------------------------------------
if(TextoP[playerid] == Text3D:-1) {
    TextoP[playerid] = Create3DTextLabel(inputtext, 0xfafa89ff, 30.0, 40.0, 50.0, 40.0, 0);// inputtext del dialog..
    Attach3DTextLabelToPlayer(TextoP[playerid], playerid, 0.0, 0.0, 0.7);
}
else {
    Update3DTextLabelText(TextoP[playerid], 0xfafa89ff, inputtext);
}

//En OnPlayerDisconnect
if(TextoP[playerid] != Text3D:-1) Delete3DTextLabel(TextoP[playerid]);