SCCM 2012 application catalog 404

While working on a project, I ran into a problem with App Catalog.
When I manually typed the application Catalog path in a browser, received -
404 - File or directory not found.
The resource you are looking for might have been removed, had its name changed, or is temporarily unavailable.

When accessing application Catalog from the software center, received -
“Cannot connect to the application server.”
The website cannot communicate with the server. This may be a temporary problem. Click the Retry action to submit your request again. If this problem continues, try again later, or view the “More Information” section to see details about the problem.

Based on the error msg’s, it is obvious that there is a problem with the installation of the application Catalog.
To review the status of the application Catalog open SMSAWEBSVCSetup.log from %SCCM_drive%\Program Files\Microsoft Configuration Manager\Logs\

I have noticed following error msg in SMSAWEBSVCSetup.log
Error: IIS ASP.NET is not registered
Installation Failed. Error Code: 126

So the problem is with the registration of ASP .NET
To register ASP .NET, Navigate to "C:\Windows\Microsoft.NET\Framework\v.4.0.30319\” and run “aspnet_regiis.exe –i “

So the command is: C:\Windows\Microsoft.NET\Framework\v.4.0.30319\aspnet_regiis.exe –i

This has resolved the application Catalog website issue.