# Sitecore commerce 9.1 Installation failed - 502.5 Failed to start

I am trying to install Sitecore Commerce 9.1 locally, I have followed the installation guide and all went well until I get this exception. I can see there are four websites created in IIS(CommerceAuthoring_Sc911com,CommerceMinions_Sc911com,CommerceOps_Sc911com, CommerceShops_Sc911com)

I have looked into the Event viewer and found below:

MACHINE/WEBROOT/APPHOST/COMMERCESHOPS_SC911COM' with physical root 'c:\inetpub\wwwroot\CommerceShops_Sc911com\' created process with commandline 'c:\inetpub\wwwroot\CommerceShops_Sc911com\Sitecore.Commerce.Engine.exe ' but failed to listen on the given port '46791'

Does anyone seen this error or know how to fix this? Any suggestions will be appreciated.

• Sitecore version: 9.1.1
• SIF version: 2.1.0
• Powershell extensions version: 5.0
• SXA: 1.8.1 rev 190319fpr 9.1.1
• Dotnet core: 2.1.505

A snippet of Deploy-Sitecore-Commerce.ps1

CommerceEngineDacPac = "C:\Sitecore\install\XC911\Sitecore.Commerce.Engine.DB.dacpac" CommerceOpsServicesPort = "5015" CommerceShopsServicesPort = "5005" CommerceAuthoringServicesPort = "5000" CommerceMinionsServicesPort = "5010" SitecoreBizFxPort = "4200"

I have seen this post but looks like that not exactly what I am facing here.

• Is port 46791 already used on your machine? – Emanuele Ciriachi May 14 '19 at 9:47
• @EmanueleCiriachi it's not been used. – Dheeraj Palagiri May 14 '19 at 10:04
• Sorry, it was just a shot in the dark. Perhaps excessive security? Third party antivirus? Ports locked down? – Emanuele Ciriachi May 14 '19 at 10:05
• What version of .net core did you installed? – Vlad Iobagiu May 14 '19 at 10:06
• But according to the PowerShell script, CommerceShopsServices should be listening to port 5005. Don't know why it's trying to listen to 46791. – Dheeraj Palagiri May 14 '19 at 10:08

Get-EventSubscriber -SourceIdentifier "msg" | Unregister-Event