Non-critical Error Attempting To Install TCP/IP After RAS

• Microsoft Windows NT Workstation versions 3.5 and 3.51
• Microsoft Windows NT Server versions 3.5 and 3.51

SYMPTOMS

If Remote Access Service (RAS) is already installed and you attempt to install the TCP/IP protocol, the following error message appears:

   Non-Critical Error, an error has occurred.
   External Library Procedure SetupChangeServiceConfig reported
   the following error: bad or invalid parameters passed to open
   service call.

CAUSE

This problem occurs if there is incorrect RAS and TCP/IP settings in the registry.

RESOLUTION

WARNING: Using Registry Editor incorrectly can cause serious, system-wide problems that may require you to reinstall Windows NT to correct them. Microsoft cannot guarantee that any problems resulting from the use of Registry Editor can be solved. Use this tool at your own risk.

To correct this problem:

1. Verify TCP/IP protocol is not on the Installed Network Software list in Control Panel Network. If it is on the list, select it and click Remove.

2. Select Remote Access Software and click Remove (The error message mentioned above may appear. You can ignore the error message). Quit Control Panel Network.

3. Start Registry Editor (REGEDT32.EXE) and locate the following Registry subkey in the HKEY_LOCAL_MACHINE subtree:

   \SYSTEM\CurrentControlSet\Services

4. Select the TCPIP key. From the Edit menu, select Delete. Click Yes to delete the key.

5. Quit the Registry Editor.

6. Shut down and restart Windows NT.

7. In Control Panel Network, re-install TCP/IP and Related Components.

8. Re-install Remote Access Service. Then, restart Windows NT.