Private mvp room problem

[mrlongshen]

[Warning]: Unexpected type for argument 1. Expected string.[Debug]: Data: variable name='.@num' index=0[Debug]: Function: getstrlen[Debug]: Source (NPC): Private MVP Room at prontera (164,184)[Warning]: Unexpected type for argument 1. Expected string.[Debug]: Data: variable name='.@num' index=0[Debug]: Function: getstrlen[Debug]: Source (NPC): Private MVP Room at prontera (164,184)[Warning]: Unexpected type for argument 1. Expected string.[Debug]: Data: variable name='.@num' index=0[Debug]: Function: getstrlen[Debug]: Source (NPC): MVP Summoner#1 at 06guild_01 (49,49)

I got this error on private mvp room, then after a while my server crash. what is the problem ? 
how to fix it ? 

 

[Angelmelody]

as I remember , adding red part should fix that warning

set .@l, getstrlen(""+.@num);

 

[mrlongshen]

@@Angelmelody thanks ! the problem fix.

@@Angelmelody nice signature. im hearing the song lalalalala hahaha