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Manoj BadamManoj Badam 

Problem with custom template

We ran into a problem with this custom template. One or more of the regions is rendering more than once. Fix the template or choose a different one.

I am getting this error when i am customing the componnet template pages 

<design:component label="Two Column Custom App Page Template">
    <flexipage:template >
        <!-- The default width for the "left" region is "MEDIUM". In tablets,
        the width is "SMALL" -->
            <flexipage:region name="left" defaultWidth="MEDIUM">
                <flexipage:formfactor type="MEDIUM" width="SMALL" />
            </flexipage:region>
            <flexipage:region name="right" defaultWidth="SMALL" />
  <flexipage:region name="right" defaultWidth="Large" />
       </flexipage:template>
</design:component>
Best Answer chosen by Manoj Badam
Raj VakatiRaj Vakati
The reason is looks l you have duplicate region name "Right" twice 


Change it as below and try 
  
<design:component label="Two Column Custom App Page Template">
    <flexipage:template >
        <!-- The default width for the "left" region is "MEDIUM". In tablets,
        the width is "SMALL" -->
            <flexipage:region name="left" defaultWidth="MEDIUM">
                <flexipage:formfactor type="MEDIUM" width="SMALL" />
            </flexipage:region>
            <flexipage:region name="right" defaultWidth="SMALL" />
       </flexipage:template>
</design:component>