>Hi Dennis,
>
>Thanks for your anwser. I know what is error 109. My problem is that "it's not suppose to happen" as far as I can see in my code.
>
>Most of my datas modifications are made by INSERT INTO who is not suppose to lock a file more than a fraction of second. At only one place in my code I use TABLEUPDATE() and my buffering is set to 2.
>
>So As I can't find de bug I try to look at some other possibilities.

Something must be trying to update a record for error 109. I suggest you only use buffering set to 5. Any piece of code that moves the record pointer with buffer mode 2 attempts an update which could cause error 109.

HTH