Microsoft Outlook is made up of a number of application files that include library and DLL (Dynamic Link Library) files. On such file is Outllib.dll. It is a significant component of Microsoft Outlook and is managed by the Windows Registry. When this file goes missing or gets damaged, Outlook may not start and you can not access data from your PST file. This behavior cause critical data loss situations and you need PST Recovery to sort out the problem.
When this file gets damaged or does now function properly, you might come across the below error message:
“OUTLOOK caused an invalid page fault in module OUTLLIB.DLL at
When you see the application log of Microsoft Outlook, you might find the following entries in it:
“Faulting application outlook.exe, version 11.0.6353.0, stamp 408f2937,
faulting module outllib.dll, version 11.0.6359.0, stamp 40c8adfd,
debug? 0, fault address 0x00074db7.”
After this error message, Microsoft Outlook does not open and you can not access data from it. This behavior may lead to PST file corruption and eventually cause data loss. At this point, you need to find out the cause of this issue and carry out Outlook PST Recovery by sorting it out.
Root of the issue
As stated in above error message and the Event Log, this problem occurs due to corruption to either Outllib.dll or Outlook.exe file. Corruption might occur because of virus infection, application malfunction, improper system shut down and other such reasons.
There is a number of techniques or methods that you could use as troubleshooting methods to fix this issue. These procedures are as discussed below:
- If your MS Outlook application is installed in IMO (Internet Mail Only) mode, then Outlook would not function properly until you have complete and proper installation of Microsoft Outlook Express. Thus, you need to ensure that your MS Outlook Express is working appropriately.
- Incompatible or Invalid extension information could also cause such situations. Thus, you should try replacing the Extend.dat file. If you manage to start Outlook properly, uncheck the suspected add-ins.
- Try restarting Microsoft Outlook in Safe Mode.
- Create new Outlook profile and PST file. If you are using Outlook in IMO mode, then you will have to created IMO profile.
- Reinstall Microsoft Outlook or complete MS Office Suite. Here you should remove application and rename Outllib.dll file and reinstall MS Outlook.
After you carry out above solutions, you would find out that the related error messages has stopped occurring, but at the same time you may also discover that the PST file has got damaged and it become completely unusable. The issue may occur during re installation of MS Outlook or the damaged file affect Outlook library files.
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