>>>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?