force user to call read_fgout_grids_data before read_frame

clawpack · Jul 29, 2024 · 6c849f2 · 6c849f2
1 parent f373e23
commit 6c849f2
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/src/python/geoclaw/fgout_tools.py b/src/python/geoclaw/fgout_tools.py
@@ -704,6 +704,14 @@ def read_frame(self, frameno):
             fgoutX = self.X
             fgoutY = self.Y
         except:
+            msg = '\n*** Before reading frame, you must set FGoutGrid data,' \
+                  '\n*** Typically by calling read_fgout_grids_data'
+            raise ValueError(msg)
+
+            # prior to v5.11, self.read_fgout_grids_data() called here
+            # rather than raising exception...
+            print(msg)
+            print('*** Calling read_fgout_grids_data...')
             self.read_fgout_grids_data()
             fgoutX = self.X
             fgoutY = self.Y