MSSDMN EventID 26

Sometimes you get an application popup from MSSDMN (Microsoft Search Service Daemon) with following error message:

mssdmn.exe - Application Error

The instruction at “0×77ef6114″ referenced memory at “0×0000000087″. The memory could not be “written”.
Click on OK to terminate the program

or

mssdmn.exe - Application Error

The instruction at “0xffffffff” referenced memory at “0×00000000f5″. The memory could not be “read”.
Click on OK to terminate the program

The messages are different even on the same system!

If you look a bit closer you will find following information message within your system log:

Be careful that message in your system log can differ from your application popup. This is because the message popup comes when you make a crawl of your content.

For analysing check the time stamps on all EventID’s 26. You will see that they are a kind of “periodically”.

Why this happens? Do you have FoxIT PDF IFilter (mostly on x64 systems) installed? You will. This do not happen if you use the Adobe PDF IFilter. The problem is that you don’t have any choice right now within x64 systems.

This comming up from FoxIT directly:

We are pretty certain that these errors arise when a searchable PDF has been created from a “dirty” scan where there is a lot of background “mush” behind the text in the PDF.
As soon as the Foxit iFilter x64 tries to index one of these “dirty” PDFs, the server throws this app error.

For a fix you have to wait for a next version of FoxIT (v1.0.0.1729 wont fix this problem).