SharePoint web site = http://myexample:3500
SharePoint tester (admin on domain, admin on SharePoint site collection) = IAmKyle
Alternate Access Mapping: I left it at the default which is http://myexample:3500 maps to itself, and the zone is "default".
My code was deployed as a farm solution and my .dll is in the GAC. I activated a feature on my site collection (url is above). What the code does is, when the user updates a SharePoint item, my code executes a LINQ query finding "related" items. Then the related items are updated. Here are the errors I get:
On Windows Event Logs: Error loading and running event receiver [my receiver assembly]. Object reference not set to instance of an object.
On SharePoint ULS event logs: Same error as I see in Windows Event logs. Also, I was getting errors about "alternate access mapping" not being configured for http://myexample:3500 but I'm not getting them anymore. Don't know why, I haven't changed anything.
On IIS logs Getting some 401 responses for pages that I should be able to access. But, it only shows the tail end of the page in some cases e.g. "/mysite/mypage" so I'm unsure what the full URL is.
These errors are very confusing, my code 100% works on my test system. What network or sharepoint configurations should I be looking for? I'm assuming my code itself works fine considering that it does work on my test environment. Of course, I have more permissions on test since my username on test is the user who created the farm.
Thanks.
Do you get these errors when trying to activate the feature or when actually making a change to a list item?
Also, have you tried attaching the VS debugger to the process and having a look at what is going on?