Check if the VirtualBox COM service is installed on Windows.

gns3server/modules/dynamips/nodes/c7200.py

@@ -55,10 +55,6 @@ class C7200(Router):
         if npe != "npe-400":
             self.npe = npe
 
-        if parse_version(hypervisor.version) <= parse_version('0.2.13'):
-            # work around a bug when rebooting a router with NPE-400 in Dynamips <= 0.2.13
-            self.npe = "npe-200"
-
         # 4 sensors with a default temperature of 22C:
         # sensor 1 = I/0 controller inlet
         # sensor 2 = I/0 controller outlet

gns3server/modules/virtualbox/__init__.py

@@ -107,13 +107,20 @@ class VirtualBox(IModule):
 
         if sys.platform.startswith("win"):
             import win32com.client
+
             if win32com.client.gencache.is_readonly is True:
                 # dynamically generate the cache
                 # http://www.py2exe.org/index.cgi/IncludingTypelibs
                 # http://www.py2exe.org/index.cgi/UsingEnsureDispatch
                 win32com.client.gencache.is_readonly = False
-                win32com.client.gencache.Rebuild()
+                #win32com.client.gencache.Rebuild()
                 win32com.client.gencache.GetGeneratePath()
+
+            try:
+                win32com.client.gencache.EnsureDispatch("VirtualBox.VirtualBox")
+            except:
+                raise VirtualBoxError("VirtualBox is not installed.")
+
             try:
                 from .vboxapi_py3 import VirtualBoxManager
                 self._vboxmanager = VirtualBoxManager(None, None)
@@ -749,7 +756,11 @@ class VirtualBox(IModule):
         """
 
         if not self._vboxwrapper and not self._vboxmanager:
+            try:
                 self._start_vbox_service()
+            except VirtualBoxError as e:
+                self.send_custom_error(str(e))
+                return
 
         if self._vboxwrapper:
             vms = self._vboxwrapper.get_vm_list()