Exception: org.hibernate.hql.ast.QuerySyntaxException: expecting CLOSE, found 'UNION' near line 1, column 442

This is the Query which am writing in DAO file

StringBuffer subQuery = new StringBuffer();
subQuery.append(" Expense.lineNumber in (");
subQuery.append(" (SELECT ExpensePaymentAlloc.charge.lineNumber " );
subQuery.append(" FROM ExpensePaymentAllocVO as ExpensePaymentAlloc ");
subQuery.append(" WHERE ExpensePaymentAlloc.payment.payable.payableId = ");
subQuery.append( fieldValue );
subQuery.append(" ) union all ( Expense.lineNumber in ( SELECT PaymentReserve.expenseLineNumber " );
subQuery.append(" FROM PaymentReserveVO as PaymentReserve ");
subQuery.append(" WHERE PaymentReserve.payment.payable.payableId = ");
subQuery.append( fieldValue );
subQuery.append(" ))) ");

When i use this query am facting this problem, can you please provide me the steps to resole this or provide me the alternate query to this.

Thanks in advance