Getting portal error while opening theme

Hi,

Content Administration > Portal Display > Portal Themes > Theme Editor

We selected SapTradeshow -> Ajaxframeworkpage(elements) trying to open for custmizing our own theme.

but we are getting fallowing error where we did mistake.

Exception caught while getting pageInfo data: com.sap.portal.ur.ItemNotFoundException:

java.io.FileNotFoundException: /usr/sap/DVP/J05/j2ee/cluster/apps/sap.com/
com.sap.portal.design.portaldesigndata/servlet_jsp/com.sap.portal.design.portaldesigndata/
root/WEB-INF/pageInfo/AFP/pageInfoNN0.xml (No such file or directory)

Thanks

Kumar