Does anyone know why layers would continually be lost from a project and refuse to reload even though the project is regularly saved?
I can think of a few causes of this:
- if the layers are "temporary scratch layers" or "memory layers" then they are NEVER saved, and will be discarded when the project is closed. In this case you'd need to manually save these layers as a permanent file format, eg shapefile.
- if the layers are generated through an algorithm in the toolbox, and the output layer is set to
Save to temporary filethen the layer will also be deleted when QGIS is closed. You'd need to make sure you choose a proper output filename when running the algorithm.