PerformancePoint Services SharePoint 2010 + SharePoint 2013

http://sharepointknowledgebase.blogspot.com/2013/11/code-blocks-are-not-allowed-in-this.html

http://sharepointknowledgebase.blogspot.com/2013/10/unattended-service-account-for.html

http://sharepointknowledgebase.blogspot.com/2013/10/this-data-source-cannot-be-used-because.html

http://sharepointknowledgebase.blogspot.com/2014/04/were-sorry-we-ran-into-problem.html

http://sharepointknowledgebase.blogspot.com/2013/07/cannot-connect-to-performancepoint.html

http://sharepointknowledgebase.blogspot.com/2014/04/performance-point-service-could-not.html

access services problem in SharePoint 2010

Access services is unable to process the request
http://sharepointknowledgebase.blogspot.in/2013/08/access-services-is-unable-to-process.html

Cannot publish access database to SharePoint 2010 Server
http://sharepointknowledgebase.blogspot.in/2013/02/cannot-publish-access-database-to.html

If you are facing this error: 
There was an error in communicating with Access Database Service Access Database Service URL exception: The underlying connection was closed: A connection that was expected to be kept alive was closed by the server

Then request you to refer the following KB: 
http://support.microsoft.com/default.aspx?scid=kb;en-us;2398833&sd=rss&spid=14944

If you are facing the following symptoms: 

1- Event ID: 24 Description: There was an error in communicating with Access Data Services exception: <exception description> [Session: <session ID> User: <username>].

2-  Event ID: 25. Description: There was an error in communicating with Access Data Services exception: <exception description> [Session: <session ID> User: <username>].

3- Event ID: 26. Description: Unable to reach Access Data Services. [Session: <session ID> User: <username>].

then request you to check the following article: 
http://technet.microsoft.com/en-us/library/ee513086(v=office.14).aspx