Index: wflow-py/wflow/wflow_delwaq.py
===================================================================
diff -u -r91903926f238f1bc0389f39b0fa2db83e321846f -r1e9e331b728fdedd5382476d0b194b7d6ae1daae
--- wflow-py/wflow/wflow_delwaq.py	(.../wflow_delwaq.py)	(revision 91903926f238f1bc0389f39b0fa2db83e321846f)
+++ wflow-py/wflow/wflow_delwaq.py	(.../wflow_delwaq.py)	(revision 1e9e331b728fdedd5382476d0b194b7d6ae1daae)
@@ -320,7 +320,7 @@
     # make into flatted numpy arrays
     np_ptid = pcr2numpy(ptid,NaN).flatten()
     np_flowto = pcr2numpy(flowto,NaN).flatten()
-    np_catchid = pcr2numpy(scalar(amap),NaN).flatten()
+    np_catchid = pcr2numpy(scalar(amap),-999).flatten()
     np_upbound = pcr2numpy(upbound,NaN).flatten()
 
     # remove all non-active cells