On 12/02/2020 11:46, igor tascon wrote:

I am having some problems to open a mrc cryoEM map in coot. I received the map as a spi volume file and I converted it into a mrc file using xmipp_image_convert command in scipion to perform some real_space_refienement, that worked fine. However, when I open in coot the mrc file the map is loaded (I can see it in the display manager) but I can not visualise it. Besides, if I try to change the map counter level I don't see any number:
map 0 level:   nanV (   nanrmsd)


It seems as if you have a map full of zeros, sadly. To diagnose, you can use the map density histogram in Coot: Calculate -> Map Tools -> Map Density Histogram

Also, you can try mapdump

$ mapdump MAPIN converted.mrc
END

Paul.

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