Index: wflow-py/wflow/wf_DynamicFramework.py
===================================================================
diff -u -rc8a07229465447093c24e8782ab41ad8fe5a08fe -r38c741869d2ced67ba160a96d38f02eb16a74289
--- wflow-py/wflow/wf_DynamicFramework.py	(.../wf_DynamicFramework.py)	(revision c8a07229465447093c24e8782ab41ad8fe5a08fe)
+++ wflow-py/wflow/wf_DynamicFramework.py	(.../wf_DynamicFramework.py)	(revision 38c741869d2ced67ba160a96d38f02eb16a74289)
@@ -1991,7 +1991,7 @@
                     "\\", "/"
                 )
 
-                try:
+                if os.path.exists(name):
                     tvar = self.wf_readmap(
                         name,
                         0.0,
Index: wflow-py/wflow/wflow_lib.py
===================================================================
diff -u -rf1cb1cbec79ead4028cc0914fe64f0b149b51228 -r38c741869d2ced67ba160a96d38f02eb16a74289
--- wflow-py/wflow/wflow_lib.py	(.../wflow_lib.py)	(revision f1cb1cbec79ead4028cc0914fe64f0b149b51228)
+++ wflow-py/wflow/wflow_lib.py	(.../wflow_lib.py)	(revision 38c741869d2ced67ba160a96d38f02eb16a74289)
@@ -276,11 +276,14 @@
         np_outflow = pcr2numpy(outflow, np.nan)
         np_outflow_linked = np_reslocs * 0.0
 
-        np_outflow_linked[
-            np.in1d(np_reslocs, np_linkedreslocs[np_outflow < 0]).reshape(
-                np_linkedreslocs.shape
-            )
-        ] = np_outflow[np_outflow < 0]
+        with np.errstate(invalid='ignore'):
+            if np_outflow[np_outflow < 0] is not None:
+                np_outflow_linked[
+                    np.in1d(np_reslocs, np_linkedreslocs[np_outflow < 0]).reshape(
+                        np_linkedreslocs.shape
+                    )
+                ] = np_outflow[np_outflow < 0]
+
         outflow_linked = numpy2pcr(Scalar, np_outflow_linked, 0.0)
 
         fl_nr_loop = float(nr_loop)
@@ -300,7 +303,8 @@
         )
 
         np_outflow_nz = np_outflow * 0.0
-        np_outflow_nz[np_outflow > 0] = np_outflow[np_outflow > 0]
+        with np.errstate(invalid='ignore'):
+            np_outflow_nz[np_outflow > 0] = np_outflow[np_outflow > 0]
         _outflow.append(np_outflow_nz)
 
     outflow_av_temp = np.average(_outflow, 0)