#422: add warning for when viz is enabled but vttv not found

Author: cwschilly

src/lbaf/Applications/LBAF_app.py

@@ -118,6 +118,11 @@ def init_parameters(self, config: dict, base_dir: str):
 
         # Parse visualizer parameters when available
         if (viz := config.get("visualization")) is not None:
+
+            # Ensure that vttv module was found
+            if not using_vttv:
+                self.__logger.warning("Visualization enabled but vttv not found. No visualization will be generated.")
+
             # Retrieve mandatory visualization parameters
             try:
                 self.grid_size = []