I have DNN 4.5.1 and everytime the application restarts or I install a new module, the following appears in my Event View Log:

EventQueue.ProcessMessage: Message Processing Failed
ProcessorType: DotNetNuke.Entities.Modules.EventMessageProcessor, DotNetNuke
Body:
Sender:
BusinessControllerClass: DotNetNuke.Modules.Media.MediaController, DotNetNuke.Modules.Media
DesktopModuleId: 61
UpgradeVersionsList: 03.02.00,03.02.03
ExceptionMessage: Object reference not set to an instance of an object.
Server Name: ANAXAVPS78

Leadtools,

You are getting the two errors most likely due to the webfarm that you are running in.

In regards to the error, it appers to be an error with the support of IUpgradable within the Media Module, hopefully someone from that team can respond.  You could try modifying the module definition to remove support for IUpgradable, but that might not fix it.

e table in the dnn database and I found two entries that correspond to this error (They are difficult to read because they are not in a tabular format here:

4    Application_Start    0    DotNetNuke.Entities.Modules.EventMessageProcessor, DotNetNuke    UpgradeModule            xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx          4/20/2007 11:24:49 AM    4/20/2006 11:24:49 AM    
<Attributes>
  <Attribute>
    <Name>BusinessControllerClass</Name>
    <Value>DotNetNuke.Modules.Media.MediaController, DotNetNuke.Modules.Media</Value>
  </Attribute>
  <Attribute>
    <Name>DesktopModuleId</Name>
    <Value>54</Value>
  </Attribute>
  <Attribute>
    <Name>UpgradeVersionsList</Name>
    <Value>03.02.00,03.02.03</Value>
  </Attribute>
</Attributes>
False


15    Application_Start    0    DotNetNuke.Entities.Modules.EventMessageProcessor, DotNetNuke    UpgradeModule            xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx            5/15/2007 9:20:12 AM    5/15/2006 9:20:12 AM    
<Attributes>
  <Attribute>
    <Name>BusinessControllerClass</Name>
    <Value>DotNetNuke.Modules.Media.MediaController, DotNetNuke.Modules.Media</Value>
  </Attribute>
  <Attribute>
    <Name>DesktopModuleId</Name>
    <Value>61</Value>
  </Attribute>
  <Attribute>
    <Name>UpgradeVersionsList</Name>
    <Value>03.02.00,03.02.03</Value>
  </Attribute>
</Attributes>
False

 The last field (labled iscomplete) on both of these entries is "False", where the other rows have a value of "True".  I think this is the source of the problem and I was wondering if anyone could tell me with a reasonable level of certainty that deleting these entries would be relatively inconsequential?