New scan warnings appear a few seconds before the affected data.
d10 must be restarted if the CBE is reset (down, up) or restarted.
Plotting interacts with the window manager in interesting ways (??!).
I have seen focus move to the plot when the first plot appears, and seen selected text become un-selected everytime a plot appears. The -noplot switch can be handy if that is too annoying.
One cause may be the correlator configuration. d10, by default, displays data for the subband labelled as 0, but I have seen OPT generated scripts which do not produce a subband 0. To check this d10 has "summary switch (d10 -summary 1 2) wich asks it to describe all the data it is getting. If inspection shows that there is no subband 0 data, then restart d10 asking for a subband which is present. (d10 -subband x 1 2). d10 reads data from the CBE into a buffer of length 100000, so will not work reliably if there are more than 8192 channels per subband. This can be changed if needed.