Проблемы с SilkTest

Добрый день! Прошу помощи при решении проблемы
При прохождении тесткейса возникла ошибка. Error during executing the method/property 'Items.Get'. Communication error between agent and application.
вот тело функции в которой возникла ошибка
[-] ANYTYPE UI(STRING Id)
[ ] LIST of REC_Result Results
[-] if(this.UIList.Exists(timeOut))
[-] do
[ ] this.UIList.WaitForProperty("HasItems",TRUE,timeOut) //Waiting Load OrderList
[-] except
[ ] LogError("Not load List")
[ ] addResult(Results, "Error", "Not Load List")
[ ] addResult(Results, "Success", "FALSE")
[ ] return Results
[ ] window item
[ ] INTEGER i=0
[ ] INTEGER iPos=0
[ ]
[-] for each item in this.UIList.Items// здесь ругается
[ ] i++
[ ] this.UIList.Select(i)
[ ] STRING ListSelectText = this.UIList.SelectedItemText
[ ] iPos=StrPos(Id,ListSelectText)
[-] if (iPos!=0)
[ ] print("String where we find",i)
[ ] break
[-] if(iPos==0)
[ ] LogWarning("Not found")
[ ] addResult(Results, "Error", "Not found")
[ ] addResult(Results, "Success", "FALSE")
[ ] return Results

----------
SilkTest Classic 2010 R2