Limit on variables screen?

Hello,

I am having an issue where not all of my values are showing up when I click the white square button (not sure of its official name) next to one of my variables in BEx analyzer on the initial variables page.  I have over 1000 values to load so my question is, is there a physical limit as to how many values can be loaded for a variable?  If so, is there a way to change the limit?

Thanks

James