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Forums Using DNN Platform Administration and Configuration

Can't copy DNN app

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Robert Dickow
New Around Here
Posts: 6
New Around Here
6/21/2019 2:07 PM

I've tried several times to copy a DNN installation from one server to another, along with its database. DNN 9.2.2 at the moment. If only it didn't throw exceptions right away I think it would run normally.. but I get this concerning the OutputCacheModule:

[NullReferenceException: Object reference not set to an instance of an object.]
   DotNetNuke.HttpModules.OutputCaching.OutputCacheModule.OnResolveRequestCache(Object sender, EventArgs e) +513
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +141
   System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +48
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Has anybody met this problem and conquered it?


 

Will Strohl
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Posts: 1607
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6/21/2019 3:32 PM

Have you tried clearing the cache on the website before running it? I'd suggest using the clear cache feature as described in this video:

https://www.youtube.com/w...-0y8o5EBYVcCY2yzhTZk

Next, stop the current website to remove any locks on it. You can do this in IIS or your respective hosting control panel.

Now, delete all cache from the following folders:

- App_Data/Search
- Portals/_default/Cache
- Portals/#/Cache (if it exists)
- Portals/#-System/Cache

(Replace the numbers above with any relevant portal ID, as necessary.)

Leave any Placeholder.txt and ReadMe.txt files you find in those folders, but everything else can go.

Robert Dickow
New Around Here
Posts: 6
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6/23/2019 5:13 AM
I tried your suggestion, though unfortunately it did not make any difference. I still get the null reference exception having to do with a caching module. What else could it be I wonder?
Will Strohl
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6/23/2019 4:29 PM
Posted By Robert Dickow on 23 Jun 2019 05:13 AM
I tried your suggestion, though unfortunately it did not make any difference. I still get the null reference exception having to do with a caching module. What else could it be I wonder?

Hmmm... That's all I've had to do in the past. 

Mark Buelsing
Growing Member
Posts: 80
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2/3/2022 10:09 PM

I found an old post on the DNNSoftware forum on the same topic. Once again it was Will doling out the good advice. There are suggestions in there that have not been said here yet. It might have your answer. Hope so. https://www.dnnsoftware.c...null-reference-error

 

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