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Owning Palette: Advanced File VIs and Functions

Installed With: Base Package (Windows)

Reopens the instance of the file specified by refnum to temporarily change what read or write access is denied to other refnums, VIs, or applications.

Details  

	refnum is the file refnum associated with the file you want to deny access to.
	deny mode specifies what read or write access is denied. 0 deny read/write—Deny both read and write access to the file (default). 1 deny read-only—Permit read access but deny write access to the file. 2 deny none—Permit both read and write access to the file.
	error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use exception control to treat what is normally an error as no error or to treat a warning as an error. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node. status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE. code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
	refnum out returns refnum.
	error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error. status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

Deny Access Details

This function temporarily overrides permissions for a specific instance of the file. This function does not modify permissions for the file itself. When you grant access to an instance of a file, LabVIEW removes the override caused by denying access to the file so that the file permissions and the deny mode associated with refnum determine whether other refnums, VIs, or applications can read from or write to that instance of the file. After the file refnum is closed, the permissions for that instance of the file are no longer overridden.

Note  You cannot deny access to a datalog file.