Most likely this is because you loaded MTZ with with no Fourier map coefficients.
Pavel

On 9/20/14 8:39 AM, Wei Shi wrote:

Thank you so much! Is 'Create maximum entropy map' in the latest nightly build that could create the omit map you guys suggested? I was trying to run it but got the error message 'No column labels specified'. In the columns labels it shows '---' and don't give me any option to change... I just loaded my mtz file and the ligand-free pdb file and left all other settings as default. Thank you so much!

Best,
Wei

On Wed, Sep 17, 2014 at 2:39 AM, Dale Tronrud <detBB@daletronrud.com> wrote:

   I don't believe I said he was the first.  He did develop an
implementation which has proven useful to a large number of people.

Dale

On 9/16/2014 8:52 PM, Nathaniel Echols wrote:
> On Tue, Sep 16, 2014 at 11:36 AM, Dale Tronrud <detBB@daletronrud.com

> <mailto:detBB@daletronrud.com>> wrote:
>
>     This sounds like Bricogne's maximum entropy maps.
>
>
> Maybe I'm misunderstanding this reference, but I don't think Bricogne
> was the first person to come up with the idea:
>
> https://www.researchgate.net/publication/232761305_Electron_density_images_from_imperfect_data_by_iterative_entropy_maximization
>
> which I think is just an extension of the application to X-ray astronomy
> described by Gull & Daniel (1978).
>
> -Nat

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