Programs That Lock 0 Bytes at Byte 0 Lock Entire File

• Microsoft Windows NT Workstation version 4.0
• Microsoft Windows NT Server version 4.0

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-

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