LargeScroll method cause runtime error?

Hi,
I currently have this line of code in my program:

VB Code:

Windows(1).LargeScroll toLeft:=10

I want to scroll all the way to the left of my spreadsheet after I plot some data because I have several charts displayed on the left side. I get a runtime error sometimes and says the largescroll method fails. I can not figure out why or how it can. I noticed that it has a runtime error only if the current scroll bar is located close to the left side.

But it doesn't always error, only sometimes. Does anyone know why the largescroll method will fail? Thanks!