That seems to fix the problem. Thanks so much for your help.

Posted.

I'll put together an example program and post it as quick as I can. It also seems to only happen if there are multiple Vertical Axes with some of them set to "Custom" as well.

Hi, I'm having a problem with floating point overflow exceptions with the TChart object. I think I have isolated why it's happening, but not how to avoid it. Our appilcation has a graph that updates periodically, and the floating point overflow seems to happen when zooming in/out (out mostly). If I ...