Hi All,

Thank you for your replies Mattp and cjard.

Cjard, you're right about array. As soon as I stop re-dimming it, problem solved. I did never thought that it could use that much information.

the numbers are floating numbers which helps me to plot a simple world map on a drawing surface.

It is not something serious. I'm just playing around with vb.net in order to learn.

Thank you very much for your helps gents.