How to use global variables in VBA?

You can search for (Ctrl F) iTable, then insert a debugging line before the line of assignment of iTable.

For ex :

Sub MySub1()
....
....
iTable = 1
....
End Sub()

Change the code to :
Sub MySub1()
....
....
Debug.Print "Called from MySub1"
iTable = 1
....
End Sub()

You then can track the process by watching the immediate window.