[osgeo4w-dev] [osgeo4w] #601: Cannot start QGIS dev - could not load qgis_app.dll

[OSGeo4W]

#601: Cannot start QGIS dev - could not load qgis_app.dll
---------------------+---------------------------
Reporter:  chau      |      Owner:  osgeo4w-dev@…
    Type:  defect    |     Status:  new
Priority:  critical  |  Component:  Package
 Version:            |   Keywords:  qgis-dev
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 I have a problem with my OSGeo4W64 installation, specifically QGIS 3.7
 dev. When I start QGIS I get the following error:

 {{{
 Ooops, looks like an error loading QGIS.

 Details:

 Could not load qgis_app.dll
 Windows Error: The specified module could not be found.

 Help:

 Check C:\OSGeo4W64\bin\qgis-dev-bin-g.env for correct environment paths.
 }}}

 I can see {{{qgis_app.dll}}} in the {{{c:\OSGeo4W64\apps\qgis-dev\bin\}}}
 folder, but I don't have a {{{qgis-dev-bin-g.env}}} in the
 {{{c:\OSGeo4W64\bin\}}} folder.

 I have a {{{ qgis-dev-bin-g.exe}}} and a {{{ qgis-dev-bin-g.vars }}}.

 I have just updated my OSGeo4W64 installation and it uninstalled QGIS 3.7
 dev and installed a new version - and I still have the issue.

 OS: Windows 10 x64.

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Ticket URL: <https://trac.osgeo.org/osgeo4w/ticket/601>
OSGeo4W <http://trac.osgeo.org/osgeo4w>
OSGeo4W is the Windows installer and package environment for the OSGeo stack.