Hi,

Yours rasters are to big.  They are working on this issus for the 3.0 release.  
You can use the grass calculator or the gdal cal calculators found in the 
processing tools.  Use any version.  Unfortunately, they are stricter in terms 
of what you can do.  (Same, size raster, same pixel size...).  Saga has a 
raster calculator but you may need lots of memory for that one.

The gdal raster calculator is fast.

Nicolas

> Le 3 nov. 2016 à 11:08, William Kyngesburye [via OSGeo.org] 
> <ml-node+s1560n5294196...@n6.nabble.com> a écrit :
> 
> There's only the one library file, but it needs to go into the 2.1 GDAL 
> folder, not 1.11: 
> 
> /Library/Application Support/GDAL/2.1/Libraries/libNCSEwc.dylib 
> 
> > On Nov 3, 2016, at 6:35 AM, DelazJ <[hidden email]> wrote: 
> > 
> > Hi, 
> > 
> > 2016-11-03 12:02 GMT+01:00 Paul T A Drea <[hidden email]>: 
> > All, 
> > 
> > I am running macOS Sierra v10.12.1 on a MacBook Pro. 
> > 
> > I have been running the stand alone installation of QGIS 2.14.3 with ecw 
> > support successfully in the past. 
> > 
> > I downloaded and installed QGIS 2.16.3 from www.kyngchaos.com with all the 
> > associated packages. This has GDAL 2.1 
> > 
> > I also downloaded ERDAS ECW/JP2 SDK v 5.2.1 and copied the file 
> > libNCSEcw.dylib to the following location as instructed: 
> > 
> > Library/Application Support/GDAL/1.11/Libraries/libNCSEwc.dylib 
> > 
> > 
> > If I recall well, there's more than only this file to move in the readme. 
> > I do not have Sierra but QGIS 2.16 can read ecw files following Kyngchaos 
> > guidelines pn El Capitan. 
> > 
> > Regards, 
> > Harrissou 
> > On starting QGIS and loading a project with an ecw image I get a message 
> > informing me that the image is not a supported raster type. 
> > 
> > Unfortunately I am not a programmer just an end user. There are 6 of us on 
> > a mix of Windows, Linux and Mac OS systems using QGIS. 
> > 
> > This problem only seems to affect Mac users after upgrading to QGIS 2.16.x. 
> > 
> > I am obviously missing something here, can anyone help please. 
> > 
> > Thanks in advance and BR. 
> > 
> > 
> > -- 
> > Paul T. A. Drea 
> > 
> > Geodetic Consultant 
> > 
> > Tel/Fax Greece: +30-210-9649 993 
> > 
> > Cell Greece: +30-6977 30 68 47 
> > 
> > e-mail 1: [hidden email] 
> > 
> > e-mail 2: [hidden email] 
> > 
> >   
> > 
> > 
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> ----- 
> William Kyngesburye <kyngchaos*at*kyngchaos*dot*com> 
> http://www.kyngchaos.com/
> 
> "This is a question about the past, is it? ... How can I tell that the past 
> isn't a fiction designed to account for the discrepancy between my immediate 
> physical sensations and my state of mind?" 
> 
> - The Ruler of the Universe 
> 
> 
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