maybe raising a namerror

83bba7b4 · Dealga McArdle · 78c29569 · 83bba7b4 · 83bba7b4
--- a/__init__.py
+++ b/__init__.py
@@ -67,22 +67,26 @@ if __name__ != "sverchok":
    sys.modules["sverchok"] = sys.modules[__name__]
 from sverchok.core import sv_registration_utils, init_architecture, make_node_list
-from sverchok.core import reload_event, handle_reload_event
+from sverchok.core import interupted_activation_detected, reload_event, handle_reload_event
 from sverchok.utils import utils_modules
 from sverchok.ui import ui_modules
 from sverchok.utils.profile import profiling_startup
 imported_modules = init_architecture(__name__, utils_modules, ui_modules)
-node_list = make_node_list(nodes)
-if "bpy" in locals():
+if "nodes" not in locals():
-    reload_event = True
+    raise interupted_activation_detected()
-    node_list = handle_reload_event(nodes, imported_modules)
+else:
+    node_list = make_node_list(nodes)
-import bpy
+    if "bpy" in locals():
-import sverchok
+        reload_event = True
+        node_list = handle_reload_event(nodes, imported_modules)
+    import bpy
+    import sverchok
 def register():
    with profiling_startup():

--- a/core/__init__.py
+++ b/core/__init__.py
@@ -112,6 +112,13 @@ def init_bookkeeping(sv_name):
    auto_gather_node_classes()
+activation_message = """\n
+** Sverchok needs a couple of seconds to become activated when you enable it for the first time. **
+** Please restart Blender and enable it by pressing the tick box only once -- be patient!        ** 
+"""
+def interupted_activation_detected():
+    return NameError(activation_message)
 undo_handler_node_count = {}
 undo_handler_node_count['sv_groups'] = 0