Error: Duplicate type with name ‘Dynamics.Ax.application.*’ in assembly when generate Full CIL

Duplicate type with name 'Dynamics.Ax.application.*' in assembly when generate full CIL.  As a result of this issue is many things within AX may stop working and if you go into
<Company>/System administration/Setup/Services and Application Integration Framework/Inbound Ports you will see many of the services have stopped and can not be restarted this causing issues within the AX instance.

Solution : Perform below steps to resolve this issue:

• Stop all AOS instances
• Delete all files on the AOS server under C:\Program Files\Microsoft Dynamics AX\60\Server\<aos instance name>\bin\XppIL
• Connect to the model database via SQL Management studio
• Truncate the table SYSXPPASSEMBLY which lists all of the fies found in XppIL
• You can do this via the command: TRUNCATE TABLE SYSXPPASSEMBLY
• Start AOS service
• Run Full CIL