RAS Install Failure After LAN Manager 2.1 Upgrade (87136)

The information in this article applies to:

Microsoft LAN Manager 2.1
Microsoft LAN Manager 2.1a

This article was previously published under Q87136

SYMPTOMS

When attempting to install RAS after upgrading to LAN Manager 2.1, an error appears indicating that you must have LAN Manager version 2.1 in order to install the RAS service.

CAUSE

The code used to verify the version of LAN Manager that is installed uses the following logic:

   IF LANMAN.CSD exists
      IF "version" is 2.1+
         THEN its LM2.1+
      ELSE
         IF "version" is 2.0.8+
            THEN it is LM2.0c+

   ELSE
      IF [Version] section exists in LANMAN.INI
         THEN  it is LM 2.1+

This means that if the LANMAN.CSD file is not deleted when a user upgrades to LAN Manager 2.1, the installation will fail.

WORKAROUND

The immediate workaround for customers is to delete the LANMAN.CSD file.

STATUS

Microsoft has confirmed this to be a problem in LAN Manager version 2.1. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

Modification Type:	Major	Last Reviewed:	9/30/2003
Keywords:	KB87136