Dynamics AX EP Install issue : ISAPI Filter ‘C:\Windows\Microsoft.NET\Framework\v4.0.30319\\aspnet_filter.dll’ could not be loaded due to a configuration problem

EP Issue from Event viewer.

ISAPI Filter ‘C:\Windows\Microsoft.NET\Framework\v4.0.30319\\aspnet_filter.dll’ could not be loaded due to a configuration problem. The current configuration only supports loading images built for a AMD64 processor architecture. The data field contains the error number. To learn more about this issue, including how to troubleshooting this kind of processor architecture mismatch error, see http://go.microsoft.com/fwlink/?LinkId=29349.



Solution

Upon closer inspection of the error message I noticed the problem:


v4.0.30319\\aspnet_filter.dll

Windows doesn’t handle double slashes very well as opposed to Linux. What is strange is none of these settings are manually changed which suggests it was perhaps a Windows update that caused this, however I have no evidence beyond change control logs.

I fixed with the following process:


Opened IIS Manager and selected the IIS web server node:




In the middle pane, browse to the IIS section and select ISAPI Filters:




Expand the columns as required, looking for an Executable path with \\ in it, then click Edit:

From the above screenshot, change the \\ to \ so the path reads:

C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_filter.dll