I have a QGIS project, which has about 30 layers in the layer list. I removed one of the layers from the list, saved the project, closed QGIS. (The layer itself was from a Geopackage database, which has several other layers in it, which are still in the layer list).

I have reopened the project (few days later) and - the layer is still not in the Layers list (as you would expect). However - navigating to the Vector Geoprocessing tools - The layer is listed there as a potential input for the Geoprocessing tool (if i select it as an input, the Geoprocessing tool simply fails after about 20 seconds). I can add the layer back in, and it then appears twice in the layer list of the geoprocessing tools.

I can't see why this layer would appear as an input layer to the Geoprocessing tools, when it is clearly not in the Layers list.

Im hoping for some help in identifying why. More specifically:

  • A Python query on either a standard Geoprocessing tool (like Buffer) and/or the layer list to see if it is listed there
  • Console logging that I could implement on QGIS Project startup which would also help identify where it is being loaded as part of the project.
  • Any other ideas?
  • 2
    I am not sure if it helps, try the script in this post to get rid of the name. Sep 25, 2020 at 7:32
  • You could try to save as a new project. If the project was created under a previous version of QGIS, some now obsolete sections of the project won't be removed with a simple save, but only "up to date" sections will be carried over when using save as
    – JGH
    Sep 25, 2020 at 13:41
  • Saving as a new project didn't solve this particular problem unfortunately.
    – nr_aus
    Dec 11, 2020 at 6:24
  • You could try to save your project as qgs file (not the default zipped qgz file), than open it in a text editor and try to edit the content to get rid of the layer manually.
    – Babel
    Dec 20, 2020 at 17:50
  • @nr_aus - this sounds more like a bug than a question for this forum. If you can consistently replicate the issue, consider closing this question, and opening a bug report for QGIS. It's probably more appropriately investigated by QGIS developers. Aug 22, 2022 at 21:34


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