IIS 7 and Above
Calling LoadLibraryEx on ISAPI filter failed (v4.0.30319)
Last post Nov 20, 2013 02:34 PM by tebaker
Dec 05, 2011 09:42 AM|robasta|LINK
500 Internal Server Error
Dec 07, 2011 05:15 AM|Lloydz|LINK
Do you mean after installing .net 1.1, your 4.0 applications began running into the above issue? Have you tried re-run aspnet_regiis for .net 1.1? Since it happens after .net 1.1 is installed, it's possible the problem is that related with. If the issue
persists, could you please post your ISAPI settings here:
%windir%\system32\inetsrv\appcmd list config "Your Site Name" -section:system.webServer/isapiFilters
Dec 07, 2011 05:56 AM|robasta|LINK
Dec 07, 2011 06:58 AM|Lloydz|LINK
The settings is correct. If you add a new asp.net site and assign a new application pool, does this issue also happen?
Dec 07, 2011 09:12 AM|robasta|LINK
Aug 07, 2012 12:45 PM|kphani_prasad|LINK
settings are not correct, if you are keen , there is an extra slash on the path for the last setting...:((
I got this error, before you do any above stuff, just try below
1. Click on your computer icon in IIS
2. On right side, you see ISAPI filters - Click
3. Pick up the Filter name ASP.Net_4.0_64bit and its path MIGHT HAVE AN EXTRA \ IN THE PATH,
SO UNABLE TO LOAD THIS DLL,
4. restart IIS - should resolve the error.
isapi filter windows 8 asp.net 1.1
Aug 14, 2012 08:31 AM|ajit_kar|LINK
Yep Agree with you.. I was in to the same mess. Your statment helped me. Thanks for sharing this.. Appriciate it..
Sep 24, 2012 03:19 PM|pvera|LINK
Nov 20, 2012 03:55 PM|Rajeshvar|LINK
Thanks prasad, your solution worked for me.. and it helped a lot.
Jun 21, 2013 08:33 AM|ssuman|LINK
This double slash issue in the ISAPI Filter exe path for ASP.NET 4.0.30319.0 seems to be a systematic issue. I wonder if this has been captured in a Microsoft KB or has been addressed via some patch.
Nov 20, 2013 02:34 PM|tebaker|LINK
I am recieving a similar error message: Calling LoadLibraryEx on ISAPI filter "D:\Program Files\CA\webagent\bin\ISAPI6WebAgent.dll" failed. Any help would be appreciated.