I'm completely new to VBA and don't know very little programming in general.

I am trying to run this VBA:

hxxps : //github.com/niko86/RamerDouglasPeucker-ExcelVBA

(not allowed to post live links)

However I am getting an Error 6 - Overflow, and if I press Debug it points to this line:
rowCount = UBound(pointList)
Unfortunately I have no idea how to proceed from here. I've looked at the MS docs for both Error 6 and for the UBound function, but it's not been very fruitful.

Any help would be appreciated.



-----------
Why am I trying to run this VBA? Well, I have a dataset with about 12000 datapoints. I need to graph this. But my computer is not really powerful enough to do so smoothly. So I was hoping to reduce the number of data points to about 1000. I don't need the graph to be accurate. It just needs to "look" similar enough. I'm trying to graph in GraphPad Prism. Not excel btw.