account-financial-reporting/account_financial_report_webkit/wizard/balance_common_view.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>

        <!-- inheriting views from more than 2 differents inherited models like
        trial.balance.webkit -> account.common.balance.report -> account.common.account.report
        is not supported so we have to copy paste the same view for trial balance, balance sheet, profit & loss
          -->

    </data>
</openerp>