How to import defects attachments using Import Tool

How to Import Defects Attachments using Import Tool

Here are the steps to import defect attachments using import tool
A. Using export tool to export the defects you want to import.
B. Change the fields value in the exported file to match those in destination project userdb.
C. Using import tool to import defect record data first and pls be noted do not import at_field_history field and map the old_id to any field like old_id_record

D Import attachments and select old_id_record as field Name and select display_name as Source_Field_Label and add those attachments to the defects which have been imported in step C.