Really basic problem getting contour plots

["John Aldridge (Cefas)" <john.aldridge@cefas.co.uk>]

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Hello,
  I've just downloaded and successfully installed ncBrowse on Windows. 
I'm viewing netCDF files.
I'm  using the 'quick plot' option. I can get a contour map of a variable which is a 2d spatial variable e.g. depth(x,y).
However most of our data (numerical model output) is in a form with three or four independent variables e.g. elevation (t,x,y),  or temperature(t,x,y,z). 
Whenever I try and plot these variables I just get a message window with an OK button saying "Reading Axes from <fn>", where <fn> is the netCDF file.  
Nothing happens after that. If I click on the OK button, still nothing happens. 

I've tried the more complex form of plotting by using New Map, but basically the same thing happens, although instead I get the message "Processing VMapModel for <variable> from <fn>".

The netCdf files are about 2.5Gbytes - is it just taking a long time to read? However there is no indication that any disk access is taking place and CPU activity is flat.
I'm wondering if there is some information missing in our netCDF files, or am I doing something wrong? 

Hope you can help.
Regards
John Aldridge


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