when i am trying to simulate in Proteus it comes with error

sbit LCD_RS at P0_0_bit;
sbit LCD_EN at P0_1_bit;

sbit LCD_D4 at P2_4_bit;
sbit LCD_D5 at P2_5_bit;
sbit LCD_D6 at P2_6_bit;
sbit LCD_D7 at P2_7_bit;
sbit h at P3_6_bit;
sbit s at P3_5_bit;
void main()
{
int i,a[25],p,b,w,g,t;
char txt1[] = "push button";
char txt2[] = "got it";
char txt3[] = "no";
char txt4[] = "yes";
char txt5[] = "searching";
char txt8[] = "ready to begin";

P1=0xFF;
h=1;
s=1;
P3=00;
P1=00;
h=0;
s=0;

 Lcd_Init();                        // Initialize Lcd

  Lcd_Cmd(_LCD_CLEAR);               // Clear display
  Lcd_Cmd(_LCD_CURSOR_OFF);          // Cursor off
  Lcd_Out(1,1,txt1);                 // Write text in first row
while(s)
 {
 Lcd_Cmd(_LCD_CLEAR);               // Clear display
  Lcd_Cmd(_LCD_CURSOR_OFF);          // Cursor off
  Lcd_Out(1,1,txt5);
  for(g=0;g<25;i++)
  {
 for(i=0;i<2;i++)
 {
   P3=0x01; //0001
   delay_ms(10);
   P3=0x04; //0100
   delay_ms(10);
   P3=0x02; //0010
   delay_ms(10);
   P3=0x08; //1000
   delay_ms(10);
 }
 a[i]=P2;
 }
 for(i=0;i<25;i++)
 if(t=1)
 {
 a[w]=0;
{
if(a[i]>p)
{
b=i;
p=a[i];
}
}
 for(i=0;i<b;i++)
 {
 for(g=0;g<2;g++)
 {
   P3=0x01; //0001
   delay_ms(10);
   P3=0x04; //0100
   delay_ms(10);
   P3=0x02; //0010
   delay_ms(10);
   P3=0x08; //1000
   delay_ms(10);
 }
 }
      Lcd_Cmd(_LCD_CLEAR);               // Clear display
  Lcd_Cmd(_LCD_CURSOR_OFF);          // Cursor off
  Lcd_Out(1,1,txt2);
  switch(h)
  {
      case 1 :
       {
  w=b;
  t=1;
  }
  case 0 :
  {

  Lcd_Cmd(_LCD_CLEAR);               // Clear display
  Lcd_Cmd(_LCD_CURSOR_OFF);          // Cursor off
  Lcd_Out(1,1,txt8);
  
  }
    }

}
  {
  

 
}
}
}