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Hi Randy- > We have generated a .nc file which contains one > variable (liquid water) that we are trying to > visualize in IDV. The dimension of the grid is > 1250x1250x50. We get a exceeds maximum heap size > (which we defined to be 3gig). The file is only 75mb > but yet IDV seems to be using 3 gigabytes of memory > before we get the error. We assume we are doing > something wrong. Can you send along the error stack that you are getting? I get an error just trying to make the grid because for every point in the domain, there are three 4 byte (float) values (latitude, longitude and altitude) which ends up being over 900 mb (78125000*3*4) and my heap is only 1 Gb. However, I suspect you are getting bit further on down the line when the rendering is occurring so it would be good to know where that is. You also have to add in 4*78125000 bytes for the values themselves. If you subset the grid using the stride widget to take every other or every third point, you should be able to create an isosurface. Also, what operating system are you running the IDV on and what version are you running? > Can you load it on your system? To access the file > goto: > > the files are called: AZ.000000000.nc and > AZ.000000001.nc Thanks for the samples. Don Ticket Details =================== Ticket ID: HHW-968552 Department: Support IDV Priority: Normal Status: Open