Catch some exceptions.

gns3server/compute/vpcs/vpcs_vm.py

@@ -315,7 +315,7 @@ class VPCSVM(BaseNode):
         if sys.platform.startswith("win32"):
             try:
                 self._process.send_signal(signal.CTRL_BREAK_EVENT)
-            except OSError:
+            except (SystemError, OSError):
                 pass
         else:
             try:

gns3server/controller/compute.py

@@ -446,9 +446,13 @@ class Compute:
             self._capabilities = response.json
 
             if response.json["version"].split("-")[0] != __version__.split("-")[0]:
-                msg = "GNS3 controller version {} is not the same as compute server {} version {}".format(__version__,
-                                                                                                          self._name,
-                                                                                                          response.json["version"])
+                if self._name.startswith("GNS3 VM"):
+                    msg = "GNS3 version {} is not the same as the GNS3 VM version {}. Please upgrade the GNS3 VM.".format(__version__,
+                                                                                                                          response.json["version"])
+                else:
+                    msg = "GNS3 controller version {} is not the same as compute server {} version {}".format(__version__,
+                                                                                                              self._name,
+                                                                                                              response.json["version"])
                 if __version_info__[3] == 0:
                     # Stable release
                     log.error(msg)

gns3server/utils/asyncio/telnet_server.py

@@ -215,7 +215,7 @@ class AsyncioTelnetServer:
             try:
                 writer.write_eof()
                 yield from writer.drain()
-            except ConnectionError:
+            except (AttributeError, ConnectionError):
                 continue
 
     @asyncio.coroutine