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Interesting NullReferenceException Error VB.NET - Windows Service

Posted on 2004-10-05
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Last Modified: 2008-02-01
Hello,

I'm wiritng a service, and when attempting to start the service (after installing using installutil) I receive this is the Application Log:

Service cannot be started. System.NullReferenceException: Object reference not set to an instance of an object.
   at PxpParser.PxpParser.StartWatch() in C:\Visual Studio Projects\PxpParser\PxpParser.vb:line 135
   at PxpParser.PxpParser.OnStart(String[] args) in C:\Visual Studio Projects\PxpParser\PxpParser.vb:line 363
   at System.ServiceProcess.ServiceBase.ServiceQueuedMainCallback(Object state)



Funny thing is my Line 135 reads like this:
watcher.Path = dump

AND dump is defined earlier (outside of the funciton that line 135 is in) on line 29 as:
 Public dump As String = "c:\cytodata\dump"


AND My line 363 is just the StartWatch() in:
 Protected Overrides Sub OnStart(ByVal args() As String)
              StartWatch()
    End Sub


So What the HECK is going on! I don't get it...This service should be starting up and I am pulling my hair out. I need some direction please. Thanks in advance!!

-- croag


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Question by:croag
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2 Comments
 
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Accepted Solution

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VIkasumit earned 125 total points
ID: 12234314
Hi..

Check the Defination of watcher

If it not intialize with new keyword it is not going to accept the value.

And give a little bit more code around if that doesn't solve your problem

VIkasumit
http://www.sumitgupta.5gigs.com
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by:croag
ID: 12240591
i see what you mean. I actually need to have this project done soon. I have posted it on rentacoder.com for a couple of $$. Check it out if you would like to.  

http://www.rentacoder.com/RentACoder/misc/BidRequests/ShowBidRequest.asp?lngBidRequestId=197044

Thanks,

Croag
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