Hello!

As @brynn  recommended, I want to discuss if I experience a bug. I have a large file with 83 layers. All of them are not visible and locked, except for one.

I try to unlock/show one of them, and the program crashes.

I have already uploaded this same file for anothere question (which was solved, BTW): https://inkscape.org/forums/beyond/strange-crashing-when-trying-to-view-a-hidden-layer/

The title is misguiding, and I cannot change it so it would reflect more the question about exporting multiple layers at once. I'm sorry.

I'm in Lubuntu 20.10 with Inkscape 1.0.1 (3bc2e813f5, 2020-09-07). Pango version: 1.46.2.

Here is the output from terminal:

$ inkscape

** (org.inkscape.Inkscape:27204): WARNING **: 17:33:02.205: Failed to find resource file 'export_layers.py'. Looked in:
        /home/lobaluna/.config/inkscape/extensions/export_layers.py
        /usr/share/inkscape/extensions/export_layers.py

** (org.inkscape.Inkscape:27204): WARNING **: 17:33:02.205: Failed to find resource file 'export_layers.py'. Looked in:
        /home/lobaluna/.config/inkscape/extensions/export_layers.py
        /usr/share/inkscape/extensions/export_layers.py

** (org.inkscape.Inkscape:27204): WARNING **: 17:33:02.273: Fonts dir '/usr/share/inkscape/fonts' does not exist and will be ignored.

** (org.inkscape.Inkscape:27204): WARNING **: 17:33:07.285: <svg:g id="">: CSS Style property: "display" with default value (inline) not needed.

** (org.inkscape.Inkscape:27204): WARNING **: 17:33:11.663: <svg:g id="">: CSS Style property: "display" with default value (inline) not needed.

(org.inkscape.Inkscape:27204): Gtk-CRITICAL **: 17:33:14.656: gtk_box_gadget_distribute: assertion 'size >= 0' failed in GdlSwitcher

** (org.inkscape.Inkscape:27204): CRITICAL **: 17:33:24.153: Glib::ustring sp_attribute_clean_style(Inkscape::XML::Node*, const gchar*, unsigned int): assertion 'repr->type() == Inkscape::XML::ELEMENT_NODE' failed

(org.inkscape.Inkscape:27204): glibmm-ERROR **: 17:33:24.153: 
unhandled exception (type std::exception) in signal handler:
what: basic_string::_M_construct null not valid

Trace/breakpoint trap (core dumped)

If I use the AppImage, I get the same error message.

Could it be a Gtk vs Qt libraries thing?

I looked up in Internet and there is an unsolved bug about the glibmm-ERROR message...

So any ideas how to unlock all layers is very welcome!