OL97: 16-Bit Client Unable to Read Schedule+ Data (140404)


The information in this article applies to:

  • Microsoft Outlook, Exchange Server Edition
This article was previously published under Q140404

SYMPTOMS

You are using Microsoft Outlook for Windows 3.1 together with the 16-bit Microsoft Exchange Schedule+ Transport DLL installed from the Outlook 8.03 compact disc. When you attempt to use the Meeting Planner to view the Free/Busy details of another Schedule+ user, you receive the following message:

Unable to read schedule data...

You do not receive this error message when attempting to view the Free/Busy details of a 32-bit Schedule+ user.

CAUSE

The 16-bit Microsoft Exchange Schedule+ Transport DLL, Msoutl.dll is reading the wrong schedule file from a cached schedule object.

When Schedule+ attempts to open a new calendar it loads drivers one at a time until it finds a match with the calendar version it is attempting to view. On the first attempt to view the, Msoutl.dll creates a schedule object and caches it; if the cached object does not match the calendar version that Schedule+ is attempting to open, an attempt is made with another driver. Even though a subsequent driver may be correct for the calendar version that the user is attempting to open, an error is returned because the originally cached schedule object is not purged from the cache.

RESOLUTION

To work around this problem, you must quit and restart Outlook to view the Fee/Busy details.

For additional information on Msoutl.dll please see the following article in the Microsoft Knowledge Base:

143196 OL97: 16-Bit Outlook Can Only Open One Schedule+ Appt Book

To resolve this problem, obtain the latest service pack for Exchange Server version 5.5. For more information, please see the following article in the Microsoft Knowledge Base:

191014 XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack

STATUS

Microsoft has confirmed this to be a problem in Microsoft Outlook for Windows 3.1x, Version: 8.0. This problem was first corrected in Exchange Server 5.5 Service Pack 2.

MORE INFORMATION

Steps To Reproduce Behavior

  1. Install Outlook 8.0 for Windows 3.1x on a WfW 3.11 computer.
  2. Install the 16-bit MSOUTL add-on by running Setup from the \Support\MSOutl\Win16 directory on the Outlook 8.03 compact disc.
  3. Create User1 and User2 mailboxes on any version of Microsoft Exchange Server5.0 or later.
  4. Start Outlook Calendar and log on as User2.
  5. on the Tools menu, click Set Access Permissions and set the Default user to have Read permissions.
  6. Add at least one appointment in User2's schedule.
  7. Exit Outlook Calendar.
  8. Start Outlook Calendar and log on as User1.
  9. On the File menu, click Open and click Other's Appointment Book to open User2's schedule.
  10. Close the window displaying User2's schedule.
  11. On the File menu, click Open and click Other's Appointment Book to open User2's schedule.

Actual Results

The following error message is displayed:
Unable to read schedule data...

Expected Results

User2's schedule should be displayed.

NOTES:
  1. User1 does not have this problem when opening a 32-bit Outlook user's Calendar.
  2. If you exit Outlook Calendar and then restart it, User1 is able to open User2's schedule.
  3. If you uninstall the MSOUTL.DLL by running Setup again and choosing Remove All, the problem does not appear and User1 can open User2's schedule as many times as they want.
Modification Type:MinorLast Reviewed:8/18/2005
Keywords:kbbug kbfix KB140404
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