Check if SimStadt is installed

download_files_from_LGL_BW.py

@@ -46,7 +46,15 @@ SCRIPT_DIR = Path(__file__).parent
 WAIT_BETWEEN_DOWNLOADS = 5  # [s] Be nice to LGL Server.
 
 if EXTRACT_REGIONS:
-    SIMSTADT_FOLDER = next(Path.home().glob('Desktop/SimStadt*_0.*/'))
+    try:
+        SIMSTADT_FOLDER = next(x for x in Path.home().glob('Desktop/SimStadt*_0.*/') if x.is_dir())
+        print(f"RegionChooser has been found in {SIMSTADT_FOLDER}")
+    except StopIteration:
+        exit("No SimStadt installation found!"
+             "\nPlease copy a SimStadt installation to the desktop,"
+             "\nset EXTRACT_REGIONS to False,"
+             "\nor set SIMSTADT_FOLDER manually: SIMSTADT_FOLDER = Path('/path/to/SimStadt')"
+             )
     GML_GLOB = "LoD2_*/LoD2_*.gml"