Installing EP on desired AOS ( Enterprise Portal installation, 'AOS´XXX# cannot be reached' )

While trying to install the Enterprise portal I came across the following error on the setup :

The AOS 'Name@2712' cannot be reached. Setup cannot continue.Verify that you entered the correct server information an that the AOS is running.

This error is basically because the SetupSupport files pick the wrong/previous/deleted configuration for the Setup. The trick here is that along with the configuration what we fail to update is the Business Connected Proxy Account on the configuration, which normally points to the old server.

Solution :

Navigate to The Client Configuration from Administrative Tools, and change the Client Target to Local Client , and change the configuration to point to the correct AOS.

Navigate to Client Configuration Again, and change the Client Target to Business Connector, and point to the New AOS. 

In some cases
System Admin > Setup > System Accounts had different account mapped. correcting this resolved the issue.

Hope this helps

Data import/export framework (AX 2012 R3) - Assembly error [Solved]

Problem :

When open "Data Import \ Export parameters" or any other setup of data import export framework in Ax dynamics 2012 R3 screen system raises the following errors:

Assembly containing type Microsoft.Dynamics.AX.DMF.ServiceProxy.DmfEntityProxy is not referenced
object CLR object could not be created

error in DIEF

Solution :

1. Navigate to XppIL folder.My case i navigated to:
   C:\Program Files\Microsoft Dynamics AX\60\Server\axtestserver\bin\XppIL.
2. Take a backup of all the files in XppIL folder. 
3. Delete everything inside this folder (Make sure you stopped your AOS service )
4. Restart the AOS service.

You can now move ahead with setting up Data import/export framework parameters.