AsiaTech: Microsoft APGC Internet Developer Support Team

We focus on various troubleshooting plan and solution on IIS web platform and distributed applications

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  • Blog Post: Troubleshoot: Client Calls to DCOM "Server Failed With :A security package specific error occurred. (Exception from HRESULT: 0x80070721)."

    Customer has an web application, which needs to call a remote DCOM server. However the web application intermittently got this error message; "A security package specific error occurred. (Exception from HRESULT: 0x80070721)." Before moving forward, we need to check if the environment hits below known...
  • Blog Post: How to troubleshoot the “Red Arrow” issue in Component Services (III)

    This is an extra troubleshooting plan in additional to plan (I) and (II) . Several days ago, I worked with one problematic Win2003 environment, there is no lucky after we go through all steps in plan (I) and (II) . Although the COM+ clean reinstallation, registry keys permission, registration folder...
  • Blog Post: How to configure "RPC over HTTP" for DCOM communication in Windows 2003

    Background RPC-over-HTTP enables client programs to use the Internet to execute procedures provided by server programs on distant networks. RPC over HTTP tunnels its calls through an established HTTP port. Thus, its calls can cross network firewalls on both the client and server networks. RPC over...
  • Blog Post: How to troubleshoot DCOM 10009 error logged in system event?

    Symptom: Sometimes, we may see below DCOM 10009 errors in our system event, or we may receive the exception code 0x800706ba in our DCOM client application: Event Type: Error Event Source: DCOM| Event Category: None Event ID: 10009 Date: 2010-2-22 Time: 10:02:07 User: N/A Computer: <Computer...
  • Blog Post: Troubleshooting COM/DCOM/COM+: COM Interop with .NET

    1. .NET application may crash when calling function from native C++ dll 2. DllCanUnloadNow function isn't invoked after using classic COM components in .NET applications 3. How to run .NET component in a singleuse way 4. How to invoke 64bit native COM from 32bit .Net application
  • Blog Post: Troubleshooting COM/DCOM/COM+: General Issues

    1. How to Tune the ASPProcessorThreadMax and EmulateMTSBehavior 2. Why my DCOM service reports 10010 error 3. Identify deadlock through the hwnd handler 4. Why does client application report “RPC is Unavailable” after compiled as a Release Version? 5...
  • Blog Post: Why does client application report “RPC is Unavailable” after compiled as a Release Version?

    One customer has a DCOM application, which was developed by unmanaged C++. The client application is the managed code. When the client application is compiled as a Debug version, everything runs smoothly, however, after it runs as a Release version, an “RPC is Unavailable” happens always. Analysis...
  • Blog Post: Why my DCOM service reports 10010 error

    Symptom Sometimes we will get the following error message for your DCOM service in the System event log. Event Type: Error Event Source: DCOM Event Category: None Event ID: 10010 Date: 8/26/2009 Time: 2:35:34 PM User: XXXX Computer: XXXX Description: The server {61FE47D1...
  • Blog Post: How to run .NET component in a singleuse way

    We can set SingleUse for public classes in VB6 when creating VB ActiveX component , so that each interface call will raise new process to handle the request. Some customer would like to know how to implement in managed code. Previously, an ActiveX EXE project in VB6 can define one or more SingleUse...
  • Blog Post: How to call COM+ remotely with anonymous user

    The purpose of this tutorial is to give you an idea on how to call the COM+ server remotely. I’m not going to go into the depths of COM+ details or how to develop COM+, this tutorial is designed to show 3 ways on how to call COM+ server with VC++. Environment: Windows 2000 for server side, Windows...
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