Knowledge Base

Programs That Lock 0 Bytes at Byte 0 Lock Entire File

Article ID: 161838

Article Last Modified on 11/1/2006

Microsoft Windows NT Workstation 4.0 Developer Edition
Microsoft Windows NT Server 4.0 Standard Edition

This article was previously published under Q161838

SYMPTOMS

The client program opens a file on the server and locks 0 bytes at position (0). After this "lock_0_bytes_at_position_0," the same client cannot lock any other byte_range of that file (lock_i_bytes_at position_j, with i>0, j>0).

CAUSE

The locking mechanism incorrectly calculated the lock to be the entire file, instead of 0.

RESOLUTION

Run a different application that can lock a byte range other than 0 bytes at location byte 0 before running the application that will lock 0 bytes at byte 0. This will then cause the 0 byte locking application to function correctly.

-or-

Apply the hotfix for Windows NT 4.0.

STATUS

Microsoft has confirmed this to be a problem in Windows NT version 4.0. This problem was corrected in the latest Microsoft Windows NT 4.0 U.S. Service Pack. For information on obtaining the service pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

Additional query words: prodnt NTFS

Keywords: kbnetwork KB161838