Yoko

I'm have problem with this script:

sub taveni()
   UO.DeleteJournal()
   var orecount, i
   uo.addobject('forge')
   while uo.targeting()
      wait(100)
   wend
   wait(100)
   
   dim oretype[4]
      oretype[0] = "0x19B7"
      oretype[1] = "0x19BA"
      oretype[2] = "0x19B8"
      oretype[3] = "0x19B9"
      
   for i=0 to 3 step 1
      UO.FindType(oretype[i], "-1", "my")
      orecount = UO.FindCount()
      while orecount > 0
         UO.waittargetobject("finditem")
         UO.UseObject("forge")
         wait(1000)
         UO.FindType(oretype[i], "-1", "my")
         orecount = UO.FindCount()
      wend
   next
   UO.Print("Dotaveno")
end sub

After few time when i using it, it crashed yoko injection, and popup error window goes up with text: "Unhandled Exception" (maybe i'm wrong with that text). When i have Verbose Menu turned on, then when it's going to crash it print: "usage: findtype graphic [color container/ground/my]" into uo client. It looks like the function findtype didn't get any parametrs.
I don't know what is wrong.
I'm using uo client 1.26.4b on Sphere Server 0.51a. Tested on Yoko version 501.22 and 312.19

PS: Sorry for my bad english.

i have no reasonable answer, alas