When your code errors out and you click DEBUG and then it puts the yellow line where the error occured, before clicking the stop button to go out of break mode, you can mouse over your code where you see the word sTable and it should show you in a pop up tool tip.
If you can't see that, then while it is still in Break mode, if a window that says IMMEDIATE WINDOW is not showing, go to VIEW > IMMEDIATE WINDOW and then in that window type a question mark and the string name and hit your Enter key like this:
? sTable
Then it should show you the value in that window, if there is one. If not it will be blank or say null.