After you have upgraded from BizTalk 2004 to BizTalk 2006, you will be unable to read the old events generated prior to upgrade in the event viewer. In order to view those events, please follow the instructions below
- Copy the btsmsg.dll file from the BizTalk 2004 installation CD (For english, you can find it in <CD>\Msi\Program Files\1033).
- Copy this dll to the BizTalk Install Folder and rename it to BTSMsg_2004.dll
- Register this dll using regsvr32 and now, the Voyager event entries are available for viewing.
Note: This file will not be removed when the BizTalk 2006 is uninstalled. Please use /u option in regsvr32.exe to unregister the dll and then remove it from the install location.