Microsoft KB Archive/281729

= SNA Server/Host Integration Server 2000 Manager Gives &quot;CoCreateInstance Failed&quot; Error =

Article ID: 281729

Article Last Modified on 2/22/2007

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APPLIES TO


 * Microsoft Host Integration Server 2000 Standard Edition
 * Microsoft SNA Server 3.0 Service Pack 2
 * Microsoft SNA Server 3.0 Service Pack 3
 * Microsoft SNA Server 3.0 Service Pack 4
 * Microsoft SNA Server 4.0
 * Microsoft SNA Server 4.0 Service Pack 1
 * Microsoft SNA Server 4.0 Service Pack 2
 * Microsoft SNA Server 4.0 Service Pack 3
 * Microsoft SNA Server 4.0 Service Pack 4

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This article was previously published under Q281729



SYMPTOMS
When you are using SNA Server and Host Integration Server 2000 Manager, you may receive the following error message when you attempt to expand the Microsoft SNA Manager tree:

CoCreateInstance failed

(There may also be other scenarios in which this error occurs.)

After you click OK, the Manager closes. If Dr. Watson was configured as the default debugger, a Drwtsn32.log file is created.

The following is an example of a Dr. Watson file that was created in a scenario in which Host Integration Server 2000 was installed on a Windows 2000 Server. The Drwtsn32.log file indicates that an application exception occurred in MMC.exe in function CSnaOleObj::DoVerb: Application exception occurred: App: mmc.exe (pid=) When: 10/25/2000 @ 11:13:48.022 Exception number: c0000005 (access violation) . [data omitted] . State Dump for Thread Id 0xab8

eax=00000000 ebx=00311518 ecx=00be2500 edx=00000000 esi=00000000 edi=00000112 eip=6780d68f esp=0006f7e4 ebp=0006f814 iopl=0        nv up ei pl nz na pe nc cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00000202

function: CSnaOleObj::DoVerb 6780d680 8b542408        mov     edx,[esp+0x8]          ss:0088cdbb=???????? 6780d684 8b8190000000    mov     eax,[ecx+0x90]         ds:00be2590=00000000 6780d68a 52              push    edx 6780d68b 8b542408        mov     edx,[esp+0x8]          ss:0088cdbb=???????? FAULT ->6780d68f 8b08            mov     ecx,[eax]              ds:00000000=???????? 6780d691 52              push    edx 6780d692 50              push    eax 6780d693 ff5158          call    dword ptr [ecx+0x58]   ds:013ffad6=???????? 6780d696 c20800          ret     0x8 6780d699 90              nop 6780d69a 90              nop 6780d69b 90              nop 6780d69c 90              nop 6780d69d 90              nop 6780d69e 90              nop 6780d69f 90              nop



CAUSE
The SNA Server/Host Integration Server 2000 Web Client was installed on a computer that already had SNA Server or Host Integration Server 2000 installed on it.

When you use a Web browser to install the Web Client, you are warned that you cannot install over an existing client/server installation. For additional information, click the article number below to view the article in the Microsoft Knowledge Base:

280740 Issues Surrounding the SNA Server/HIS 2000 Web Client

However, if you were viewing the Web Client files from My Computer or Windows Explorer and inadvertently ran the 3270full.htm or 5250full.htm file, the Web Client installation would have proceeded without warning.



RESOLUTION
Use the following procedure to resolve this problem:
 * 1) Close the Manager and stop the SNABase service.
 * 2) Use the Add/Remove utility in Control Panel to remove the Web client.
 * 3) Rerun the SNA Server/Host Integration Server 2000 Setup and select the reinstall option.
 * 4) Restart the computer.
 * 5) Go back into SNA Server/Host Integration Server 2000 Manager and test.

Additional query words: HIS 2000

Keywords: KB281729

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