PC NT: 4,292,967,295 File Locks on .MMF and .CAL Files (122578)
The information in this article applies to:
- Microsoft Mail for PC Networks 3.0
- Microsoft Mail for PC Networks 3.2
This article was previously published under Q122578 SYMPTOMS
When you view the file locks on a user's eight-digit hexadecimal ID .CAL or
.MMF file from the Windows NT version 3.1 or 3.5 Control Panel (in the
Control Panel window, choose the Server icon and then select the In Use
button), you may see 4,292,967,295 file locks reported in the Locks field.
CAUSE
This problem occurs when the Mail client is installed on Windows 3.1 with
the LAN Manager 2.x drivers and the postoffice is on Windows NT 3.1 or 3.5.
LAN Manager uses Lock&Read to do its locks and it uses Lock&X to do its
unlocks. Windows NT increments and decrements the NumberOfLocks variable
when a Lock&X is issued. Therefore, all unlocks are done within Lock&X,
which decrements the variable, but all locks are done in Lock&Read, which
doesn't touch the variable. This causes the fi3_num_locks value, as
reported by SrvNetFileEnum, to be at -4 when the logon is complete.
This problem does not occur when Microsoft Mail is installed on a Windows
3.1 or 3.11 for Workgroups client.
STATUS
Microsoft is researching this problem and will post new information here in
the Microsoft Knowledge Base as it becomes available.
| Modification Type: | Major | Last Reviewed: | 11/5/1999 |
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| Keywords: | KB122578 |
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