SWPM: DBSIZE.XML does not exist

Dear Experts,

I am working on solution manager 7.1 SYSTEM COPY. During system copy, we are stuck in Export preparation phase with the following error;

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An error occurred while processing option SAP Solution Manager 7.1 Support Release 1 > Software Life-Cycle Options > System Copy > Oracle > Source System Export > High-Availability System > Based on AS ABAP and AS Java > Export Preparation(Last error reported by the step: Unable to open URL file:///oracle/XXX/sapdata1/XXX_EXP/table_split/sapinst_instdir/SOLMAN71/LM/COPY/ORA/EXP/HA/AS/PREEXP/DBSIZE.XML)

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If anyone encountered this error, Please help.

Regards,

Wajid