Hi Aman,
Kindly check idmv_value_basic or idmv_vallink_basic views for any user mskey and see whether all the required fields are available in that view. If yes, then instead of joins, please create a job use export to ascii file and pass the mskeys of the identities in the source tab via query as joins would take consume time and checks needs to be performed. I usually extract the distinct mskeys and pass it via query to the job and export the report.
Regards,
DP