Performance point service errors in share point wfe servers event viewer

HI

i am facing a problem in performance point service , i seen two errors  in event viewer of a sharepoint wfe server

An exception occurred while the width of the Web. Diagnostic information that may help determine the cause of the following in this issue: 

Microsoft.PerformancePoint.Scorecards.BpmException: There is a problem in the preparation of a Web Part for display. 

Error code "Services PerformancePoint" is 20700.

2 error)

Log Name:      Application

Source:        Microsoft-SharePoint Products-PerformancePoint Service

Date:          02/09/35 01:11:41 م

Event ID:      39

Task Category: PerformancePoint Services

Level:         Error

Keywords:     

User:          NT AUTHORITY\IUSR

Computer:      XYZWFE02.XYZportal.com

Description:

A PerformancePoint service application call was aborted by the caller.  This may indicate the HttpRuntime executionTimeout for the Web Application is configured to a value smaller than the DataSourceQueryTimeout for the PerformancePoint Service Application.

Event Xml:

<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">

  <System>

    <Provider Name="Microsoft-SharePoint Products-PerformancePoint Service" Guid="{A7CD5295-CBBA-4DCA-8B67-D5BE061B6FAE}" />

    <EventID>39</EventID>

    <Version>14</Version>

    <Level>2</Level>

    <Task>1</Task>

    <Opcode>0</Opcode>

    <Keywords>0x4000000000000000</Keywords>

    <TimeCreated SystemTime="2014-06-29T10:11:41.385108100Z" />

    <EventRecordID>1422377</EventRecordID>

    <Correlation ActivityID="{D707EAF7-6A6A-45FA-AF83-77DC3231B658}" />

    <Execution ProcessID="18236" ThreadID="19172" />

    <Channel>Application</Channel>

    <Computer>XYZWFE02.XYZportal.com</Computer>

    <Security UserID="S-1-5-17" />

  </System>

  <EventData>

  </EventData>

</Event>

adil