[Fwd: [gdal-dev] The proj.dll mistery]

guillaume huby guillaume.huby.lists at gmail.com
Tue Jul 1 03:19:40 EDT 2008


> -------- Message original --------
> Sujet: [gdal-dev] The proj.dll mistery
> Date: Mon, 30 Jun 2008 23:46:55 +0100
> De: Joaquim Luis <jluis at ualg.pt>
> Pour :: gdal-dev at lists.osgeo.org
>
> Hi,
>
> OK, I recovered from a  mysterious sudden stop working of my gdalwarp
> and ogrproj MEX files. All I had were error messages like
>
> "Failed to create coordinate transformation between the
> following coordinate systems.  This may be because they
> are not transformable, or because projection services
> (PROJ.4 DLL/.so) could not be loaded."
>
> But not long ago those worked ok. It turn out that probably the culprit
> was the "VantagePoint" here pointed out recently, that installed an
> older (incompatible??) version of proj.dll on "C:\WINDOWS\system32"  (I
> hate softs that do it).
>
> When I have dll conflicts, I always use the Dependency Walker to help me
> out, but in this case (an others??) the gdal.dll (trunk version) didn't
> show up any dependency on proj.dll. So it was a matter of "and what if
> it is in system32?" lucky guess that allowed me to solve the problem.
> There are plenty of dll dependencies on gdal.dll. Why not on proj.dll?
>

Joaquim,

I had the same problem some time ago, the message you had appeared in the
middle of a Matlab session.

The problem solved when I restarted Matlab ...

Now that you pointed out that accessing to different releases of proj.dll
might cause the problem, I will check it if the message appear again ...

Thanks,
Guillaume.
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