I was trying to generate a catchment area from a DEM and got the error message:
The following layers were not correctly generated.<ul><li>/var/folders/ft/rbsnpzy96r76t8rkj5fdtzc40000gn/T/processing_9c115a04040346468f5f515f34c18060/56eb9d666ec44bd5a5ffeb946d486006/FLOW.sdat</li><li>/var/folders/ft/rbsnpzy96r76t8rkj5fdtzc40000gn/T/processing_9c115a04040346468f5f515f34c18060/7d782906ca3b428899252f6f368f308f/FLOW.sdat</li></ul>You can check the 'Log Messages Panel' in QGIS main window to find more information about the execution of the algorithm.
When I checked the Log Messages it indicated this:
SAGA Version: 2.3.1 ____________________________ library path: /Applications/QGIS3.app/Contents/MacOS/lib/saga/ library name: libta_hydrology library : Hydrology tool : Flow Accumulation (Top-Down) author : O.Conrad (c) 2001-2016, T.Grabs portions (c) 2010 ____________________________ Load grid: /var/folders/ft/rbsnpzy96r76t8rkj5fdtzc40000gn/T/processing_9c115a04040346468f5f515f34c18060/8340cdad8325410f9cb94c4a526ab5a8/hillshadeandyam3x3.sgrd... Flow Accumulation (Top-Down): could not initialize data objects
Any idea why it cannot initialize data objects, or how I could find out?