CDE is a window manager that runs on top of X. X is dumb and requires a Window Manager such as CDE (others include tvm, olvm, olwm, fvwm, and many more) - maybe you can try another window manager? I think Sun used to allow you to change the window manager, but I have not used it for a while.
Can you reproduce this problem on multiple machines with a fixed pattern that always produces the error? If so, we would look at it (support@ni.com) if you get all the version numbers (Solaris, CDE, X, and so forth), attach the VI and any instructions to reproduce this issue. The more details the better, it makes it easier for us to reproduce.
thanks, hope it works out
ben schulte
national instruments