Database.SaveResult saveAccountResult;

        try {

            // Upsert Account object
            saveAccountResult = Database.update(accountObj);
        }
        catch(Exception e) {
            System.debug('---->Account update error' + e);
            ApexPages.addmessage(new
            ApexPages.message(ApexPages.severity.ERROR,e.getMessage()));
            return null;
        }