Index: wflow-py/wflow/wf_DynamicFramework.py
===================================================================
diff -u -r5a35482661552a440f090200fcdf0d0f5b14729a -rfc26a9323efe7b4f097394506286f5bd83bc1090
--- wflow-py/wflow/wf_DynamicFramework.py	(.../wf_DynamicFramework.py)	(revision 5a35482661552a440f090200fcdf0d0f5b14729a)
+++ wflow-py/wflow/wf_DynamicFramework.py	(.../wf_DynamicFramework.py)	(revision fc26a9323efe7b4f097394506286f5bd83bc1090)
@@ -307,9 +307,9 @@
 
         for par in self.modelparameters:
             if self._userModel()._inInitial():
-                if par.type == 'tbl':
+                if par.type == 'tbl' or par.type =='tblsparse':
                     if not hasattr(self._userModel(), par.name):
-                        self._userModel().logger.info("Adding " + par.name + " to model.")
+                        self._userModel().logger.info("Initial: Adding " + par.name + " to model.")
                     tblname = os.path.join(self._userModel().Dir, par.stack)
                     theparmap = self.readtblFlexDefault(tblname, par.default, *par.lookupmaps)
                     setattr(self._userModel(), par.name, theparmap)
@@ -323,6 +323,7 @@
                                                     self._userModel().Soil,
                                                     par.default)
                     setattr(self._userModel(), par.name, theparmap)
+
                 if par.type == 'staticmap':
                     if not hasattr(self._userModel(), par.name):
                         self._userModel().logger.info("Adding " + par.name + " to model.")
@@ -355,12 +356,6 @@
                     theparmap = cover(theparmap, par.default)
                     setattr(self._userModel(), par.name, theparmap)
 
-                if par.type == 'tbl':
-                    if not hasattr(self._userModel(), par.name):
-                        self._userModel().logger.info("Adding " + par.name + " to model.")
-                    tblname = os.path.join(self._userModel().Dir, par.stack)
-                    theparmap = self.readtblFlexDefault(tblname, par.default, *par.lookupmaps)
-                    setattr(self._userModel(), par.name, theparmap)
 
                 if par.type == 'hourlyclim':
                     if not hasattr(self._userModel(), par.name):
@@ -384,7 +379,26 @@
                                                         par.default)
                     setattr(self._userModel(), par.name, theparmap)
 
+                if par.type == 'tbl':
+                    if not hasattr(self._userModel(), par.name):
+                        self._userModel().logger.info("Adding " + par.name + " to model.")
+                    tblname = os.path.join(self._userModel().Dir, par.stack + "_" + str(self._userModel().currentStep))
+                    theparmap = self.readtblFlexDefault(tblname, par.default, *par.lookupmaps)
+                    setattr(self._userModel(), par.name, theparmap)
 
+                if par.type == 'tblsparse':
+                    if not hasattr(self._userModel(), par.name):
+                        self._userModel().logger.info("Adding " + par.name + " to model.")
+
+                    tblname = os.path.join(self._userModel().Dir, par.stack + "_" + str(self._userModel().currentStep))
+                    if os.path.exists(tblname):
+                        theparmap = self.readtblFlexDefault(tblname, par.default, *par.lookupmaps)
+                        setattr(self._userModel(), par.name, theparmap)
+                    else:
+                        self._userModel().logger.debug(tblname + " not available for this step, using previous value.")
+
+
+
     def wf_timeinputscalar(self, tssfile, areamap, default):
         """
 
@@ -514,11 +528,11 @@
                 newargs = []
                 args = list(args)
                 for mapje in args:
-                    if len(os.path.splitext(mapje)[1]) > 1:
+                    if len(os.path.splitext(mapje)[1]) > 1: # We have an extension...
                         newargs.append(os.path.join(self._userModel().caseName, mapje))
                         # we specify a full map
                     else:
-                        # Assume we have monthly climatology
+                        # Assume we have monthly climatology as no extension is present
                         theparmap = self.wf_readmapClimatology(os.path.join(self._userModel().caseName, mapje), kind=1,
                                                                default=default, verbose=True)
                         theparmap = cover(theparmap, default)
Index: wflow-py/wflow/wflow_routing.py
===================================================================
diff -u -rff596787764e8625c7d923eec003f0de94287449 -rfc26a9323efe7b4f097394506286f5bd83bc1090
--- wflow-py/wflow/wflow_routing.py	(.../wflow_routing.py)	(revision ff596787764e8625c7d923eec003f0de94287449)
+++ wflow-py/wflow/wflow_routing.py	(.../wflow_routing.py)	(revision fc26a9323efe7b4f097394506286f5bd83bc1090)
@@ -526,11 +526,11 @@
         modelparameters.append(self.ParamType(name="InwaterForcing",stack=self.IW_mapstack ,type="timeseries",default=0.0,verbose=True,lookupmaps=[]))
         modelparameters.append(self.ParamType(name="Inflow",stack=self.Inflow_mapstack,type="timeseries",default=0.0,verbose=False,lookupmaps=[]))
         modelparameters.append(self.ParamType(name="ReserVoirLocs",stack='staticmaps/wflow_reservoirlocs.map',type="staticmap",default=0.0,verbose=False,lookupmaps=[]))
-        modelparameters.append(self.ParamType(name="ResTargetFullFrac",stack='intbl/ResTargetFullFrac.tbl',type="tbl",default=0.8,verbose=False,lookupmaps=['staticmaps/wflow_reservoirlocs.map']))
-        modelparameters.append(self.ParamType(name="ResTargetMinFrac",stack='intbl/ResTargetMinFrac.tbl',type="tbl",default=0.4,verbose=False,lookupmaps=['staticmaps/wflow_reservoirlocs.map']))
-        modelparameters.append(self.ParamType(name="ResMaxVolume",stack='intbl/ResMaxVolume.tbl',type="tbl",default=0.0,verbose=False,lookupmaps=['staticmaps/wflow_reservoirlocs.map']))
-        modelparameters.append(self.ParamType(name="ResMaxRelease",stack='intbl/ResMaxRelease.tbl',type="tbl",default=1.0,verbose=False,lookupmaps=['staticmaps/wflow_reservoirlocs.map']))
-        modelparameters.append(self.ParamType(name="ResDemand",stack='intbl/ResDemand.tbl',type="tbl",default=1.0,verbose=False,lookupmaps=['staticmaps/wflow_reservoirlocs.map']))
+        modelparameters.append(self.ParamType(name="ResTargetFullFrac",stack='intbl/ResTargetFullFrac.tbl',type="tblsparse",default=0.8,verbose=False,lookupmaps=['staticmaps/wflow_reservoirlocs.map']))
+        modelparameters.append(self.ParamType(name="ResTargetMinFrac",stack='intbl/ResTargetMinFrac.tbl',type="tblsparse",default=0.4,verbose=False,lookupmaps=['staticmaps/wflow_reservoirlocs.map']))
+        modelparameters.append(self.ParamType(name="ResMaxVolume",stack='intbl/ResMaxVolume.tbl',type="tblsparse",default=0.0,verbose=False,lookupmaps=['staticmaps/wflow_reservoirlocs.map']))
+        modelparameters.append(self.ParamType(name="ResMaxRelease",stack='intbl/ResMaxRelease.tbl',type="tblsparse",default=1.0,verbose=False,lookupmaps=['staticmaps/wflow_reservoirlocs.map']))
+        modelparameters.append(self.ParamType(name="ResDemand",stack='intbl/ResDemand.tbl',type="tblsparse",default=1.0,verbose=False,lookupmaps=['staticmaps/wflow_reservoirlocs.map']))
 
 
         return modelparameters