>>I have the code below:
>>
>> close data
>> do backup.prg
>>
>>But suppose that my table is still open in a network
>>I don't remember which is the command to check if table is in use
>
>You can try to get an exclusive hold on the data like so:
>

>ErrCode = 0
>ON ERROR ERRCODE = 1
>OPEN DATA <your dbc name here> EXCLUSIVE
>if ERRCODE=1
> =MessageBox("File access is denied.")
>else
> close data
> do backup.prg
>endif
>

>
>Yelena

Since Moises uses VFP9, it's even easier

Try
  OPEN DATA <your dbc name here> EXCLUSIVE
  close data
  do backup.prg
Catch
 =MessageBox("File access is denied.")
Endtry