Version: 20 R7 BETA

Is data file locked

Is data file locked : Boolean

Parameter	Type		Description
Function result	Boolean	←	True = file/segment locked False = file/segment not locked

The Is data file locked command returns True if the data file of the open database or at least one of its segments is locked — i.e. write protected.

Placed, for instance, in the , this command enables the prevention of any risk of accidental opening of a locked data file.

This method will prevent the opening of the database if the data file is locked:

 If(Is data file locked)
    ALERT("The data file is locked. Impossible to open database.")
    QUIT 4D
 End if