Posts Tagged ‘error message’

Dear all,

this is a quick one.


The Problem.

Recently I had the problem of not being able to create a page based on a custom master page and page layout. The error shown was:


“List does not exist”

“The page you selected contains a list that does not exist”

When clicking on “Site Actions”-> “Create Page”, it simply wouldn’t show the insertion mask for title and URL, but issue the above shown error. The solution for this is easy and quick.

The Solution.

It is quite easy to solve this problem. The authenticated users just don’t have the permissions to read the master page gallery – or in other words: No masterpage access, no new page (which makes sense). Hence, you can go to:

Site Actions –> Site Settings –> Master pages and page layouts –> Settings –> Document library settings –> Permissions

and add there the group NT AUTHORITY\authenticated users (Read, Restricted Read), just like in the screenshot given below:


Return to the site or page where you initially wanted to create a page, and you will see it is going to create the page without problems.


I hope this was of some help!

Have a good time and stay tuned to the next blog post!

Best regards,


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Dear all,

While reviewing the Microsoft Operations Framework (MOF) and Checklists for the daily use of monitoring health of SharePoint environments, I found the following interesting information about memory leak detection.


These for sure are among the worst things that can happen to a SharePoint administrator, since they can cause occasional downtimes and cryptic error messages.


As with almost any troubleshooting approach for SharePoint, you should go to the ULS logs and search for specific error messages. These are the two most common sources of memory leaks:


1. “An SPRequest object was not disposed before the end of this thread. To avoid wasting system resources, dispose of this object or its parent (such as a SPSite or SPWeb) as soon as you are done using it. This object will now be disposed”

Careful: Watch out for large numbers of this error message. It can be the case that such messages are “false positives”. Luckily, the ULS logs provide also object counts, so you can easily see whether this is occurring often or only a single event.


2. No specific error message, but:

Symptom: Intermittent application pool recycles.

Result: Downtime.

Problem: Hard to reproduce and debug for the administrator.

Explanation: Not properly disposed objects cause the garbage collector not to be able to recover used memory. As a result, the growth of memory by the application pool can increase greatly, causing a security protection mechanism to trigger an application pool recycle.


Solution for both problems: Dispose objects properly. Microsoft provides a guide on how to do this properly here:


Best Practices: Using Disposable Windows SharePoint Services Objects


Also, there is a very handy tool to detect memory leaks, which detects possible memory leaks in custom SharePoint solutions which do not comply with Microsoft’s best practices. You can find descriptions and the download of this tool here:


SharePoint Dispose Checker Tool


Happy and (safe) coding & stay tuned till the next time!


Best regards,


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