I've upgraded to ArcGis 10.5 and have tried to install the relevant ArcHydro version (obtained from /archydro/archydro/Setup/10.5/), but the installation won't progress beyond the 'PreInstall' stage. The message that pops up says 'The ApFramework could not find the Arcgis 10.3 for Desktop install directory C:\ ARCGISHOME\'. Can anyone assist?
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