Problem with "Merge" in TZ2009

[Brodie]

I am having a problem trying to merge two routes. I have done this successfully many times in TZ2006 so I thought I knew what I was doing. In TZ2009 when I try to merge two routes I cannot scroll (using the right-left-up-down arrows on the margins of the frame) to the place where I want to add the imported route. I can move the imported route using the scrolling keys at the bottom of the screen in the center between the check mark and the X (escape). Do I have a problem with TZ2009 or am I doing something wrong?

 

[nfitzsimmons]

I've successfully merged a number of routes, including HOG routes, in 2009 with no problems.

Are the two routes very large, or have a large number of objects? I've noticed that for very large and/or complex routes it can take a while for them to complete loading.