no zero node indices

NCAS-CMS · Feb 29, 2024 · d63b11b · d63b11b
1 parent e118912
commit d63b11b
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/cf/regrid/regrid.py b/cf/regrid/regrid.py
@@ -1707,6 +1707,12 @@ def create_esmpy_mesh(grid, mask=None):
     node_count = node_ids.size
     node_owners = np.zeros(node_count)
 
+    # Make sure that node IDs are >= 1, as needed by newer versions of
+    # esmpy
+    min_id = node_ids.min()
+    if min_id < 1:
+        node_ids += min_id + 1
+
     # Add nodes. This must be done before `add_elements`.
     esmpy_mesh.add_nodes(
         node_count=node_count,