>>>>>>>>I have a Form with parent/child forms. Is multi users.
>>>>>>>>when I insert a record and many users use the form, the error is produced. and I then select an option (cancel or ignore) and the application break!
>>>>>>>>
>>>>>>>>I use bufferMode = 3
>>>>>>>>And begin - end transacction when insert record
>>>>>>>
>>>>>>>What is the error message? Presumably, inserting new record can produce nothing more then index uniqueness violation.
>>>>>>
>>>>>>The problem is when they are many users using the System. And the worst it is that the system breaks after showing the message of error.
>>>>>
>>>>>I got it already; but what is the error message?
>>>>
>>>>when there are many users inserting in the same table, the error occurs.
>>>
>>>What error? If you want to get any kind of technical assistance here, then you should post literal error message, at least.
>>
>>Record is in use by another user (Error 109)
>
>What do you use to insert a record: APPEND or INSERT-SQL? The latter way shouldn't create any access problems.

I use INSERT - SQL