diff --git a/daliuge-engine/dlg/graph_loader.py b/daliuge-engine/dlg/graph_loader.py
index e0db1d488..f3123f800 100644
--- a/daliuge-engine/dlg/graph_loader.py
+++ b/daliuge-engine/dlg/graph_loader.py
@@ -437,6 +437,8 @@ def _getKwargs(dropSpec):
         "uid",
         "Application",
         "dropclass",
+        "appclass",
+        "dataclass",
         "data",
         "Data",
     ]
diff --git a/daliuge-translator/dlg/dropmake/lg_node.py b/daliuge-translator/dlg/dropmake/lg_node.py
index 56081b240..890850b1b 100644
--- a/daliuge-translator/dlg/dropmake/lg_node.py
+++ b/daliuge-translator/dlg/dropmake/lg_node.py
@@ -954,15 +954,27 @@ def _create_listener_drops(self, drop_spec):
     def _create_app_drop(self, drop_spec):
         # default generic component becomes "sleep and copy"
         if "appclass" in self.jd:
-            self.dropclass = self.jd["appclass"]
-            app_class = self.dropclass
-            logger.debug("Creating app drop using class: %s", self.dropclass)
-        if self.dropclass is None or self.dropclass == "":
+            app_class = self.jd["appclass"]
+        elif self.dropclass is None or self.dropclass == "":
             logger.debug("No dropclass found in: %s", self)
             app_class = "dlg.apps.simple.SleepApp"
         else:
             app_class = self.dropclass
-            execTime = self.weight
+        if self.dropclass == "dlg.apps.simple.SleepApp":
+            if self.category == "BashShellApp":
+                app_class = "dlg.apps.bash_shell_app.BashShellApp"
+            elif self.category == "Docker":
+                app_class = "dlg.apps.dockerapp.DockerApp"
+            else:
+                logger.debug("Might be a problem with this node: %s", self.jd)
+
+        self.dropclass = app_class
+        execTime = self.weight
+        self.jd["dropclass"] = app_class
+        self.dropclass = app_class
+        logger.debug("Creating app drop using class: %s", app_class)
+        if self.dropclass is None or self.dropclass == "":
+            logger.warning(f"Something wrong with this node: {self.jd}")
         if self.weight is not None:
             execTime = self.weight
             if execTime < 0:
@@ -1001,6 +1013,8 @@ def _create_data_drop(self, drop_spec):
                 self.dropclass = "dlg.data.drops.file.FileDROP"
             elif self.category == "Memory":
                 self.dropclass = "dlg.data.drops.memory.InMemoryDROP"
+            elif self.category == "SharedMemory":
+                self.dropclass = "dlg.data.drops.memory.SharedMemoryDROP"
             else:
                 raise TypeError("Unknown data class for drop: %s", self.jd)
         logger.debug("Creating data drop using class: %s", self.dropclass)
@@ -1047,6 +1061,8 @@ def make_single_drop(self, iid="0", **kwargs):
             drop_spec = self._create_gather_drops(drop_spec)
         elif self.is_service or self.is_branch:
             kwargs["categoryType"] = "Application"
+            self.jd["categoryType"] = "Application"
+            drop_spec = self._create_app_drop(drop_spec)
         kwargs["iid"] = iid
         kwargs["lg_key"] = self.id
         if self.is_branch:
diff --git a/daliuge-translator/dlg/dropmake/pgtp.py b/daliuge-translator/dlg/dropmake/pgtp.py
index 65e72a257..2d2d08de9 100644
--- a/daliuge-translator/dlg/dropmake/pgtp.py
+++ b/daliuge-translator/dlg/dropmake/pgtp.py
@@ -212,8 +212,12 @@ def _parse_metis_output(self, metis_out, jsobj):
                 group_weight[gid] = [0, 0]
             for gnode in G.nodes(data=True):
                 tt = group_weight[gnode[1]["gid"]]
-                tt[0] += gnode[1]["weight"]
-                tt[1] += gnode[1]["size"]
+                try:
+                    tt[0] += int(gnode[1]["weight"])
+                    tt[1] += int(gnode[1]["size"])
+                except ValueError:
+                    tt[0] = 1
+                    tt[1] = 1
         # the following is for visualisation using GOJS
         if jsobj is not None:
             node_list = jsobj["nodeDataArray"]