I run QGIS 1.8.0 Lisboa on a Windows 7 machine. Yesterday I attempted to install the TauDEM plugin using these instructions: http://lists.osgeo.org/pipermail/qgis-developer/2012-June/020807.html
Since doing this the GDAL tools for QGIS do not work with error:
The process failed to start. Either the invoked program is missing, or you may have insufficient permissions to invoke the program.
I understand this means they cannot find the GDAL executables. However, neither can I. Where actually are the GDAL executables in the QGIS folder? I assume I then have to add this manually to the Environmental Variables or into the GDAL tool settings in QGIS - is this correct?
PS. I can run GDAL tools through the OSGEO4W Shell so GDAL itself is alive and well.