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

ID: Q140404

The information in this article applies to:

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: 

   ARTICLE-ID: Q143196
   TITLE     : 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: 

   ARTICLE-ID: Q191014
   TITLE     : 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.
Additional query words: sched+ 
 BUG X5 #: 63079

Keywords          : kbdta exc55sp2fix
Version           : WINDOWS:97
Platform          : WINDOWS
Issue type        : kbbug
Solution Type     : kbfix

Last Reviewed: December 31, 1998