This should fix #3799.

13f131d3 · Ilya V. Portnov · 626e2dc2 · 13f131d3 · 13f131d3
--- a/ui/nodeview_space_menu.py
+++ b/ui/nodeview_space_menu.py
@@ -234,6 +234,8 @@ def make_preset_category_menu(category):
    global preset_category_menus
    if category in preset_category_menus:
        return preset_category_menus[category]
+    if not presets.check_category(category):
+        return None

    class SvPresetCategorySubmenu(bpy.types.Menu):
        bl_label = category
@@ -257,8 +259,9 @@ class NODEVIEW_MT_AddPresetOps(bpy.types.Menu):
        presets.draw_presets_ops(layout, context=context)
        for category in presets.get_category_names():
            if category in preset_category_menus:
-                class_name = preset_category_menus[category].__name__
-                layout.menu(class_name)
+                if category in preset_category_menus:
+                    class_name = preset_category_menus[category].__name__
+                    layout.menu(class_name)


 class NODE_MT_category_SVERCHOK_GROUP(bpy.types.Menu):

--- a/ui/presets.py
+++ b/ui/presets.py
@@ -358,6 +358,10 @@ def get_presets(category=None, search=None, mkdir=True):
                result.append(preset)
    return result

+def check_category(category):
+    presets = get_presets(category, mkdir=False)
+    return len(presets) != 0
+
 def get_preset(category, name):
    file_name = name + ".json"
    user = get_presets_directory(category, standard=False)