Re: Error reading COM object - COM Discussion Boards

23-Jul-07 17:50

Previously someone here asked about the following:

why the Exception Retrieving the COM class factory for component with CLSID failed due to the following error: 80004005. occurs how to resolve this.

The response was to look at the constructor of the COM object if posible, however I do not have access to the code. Other people have no problem reading this COM, could I be having a problem because my OS and IDE are both 64 bit and I am trying to read a VB6 COM object. How can I get around this problem if it is because of the 64 bit, if not what else is the possibility. What are my options, can I change a Library into 32 bit (I am using VS2005 Pro 64), build a Dll and hook into it. What would be the best way to approach this whether it is the problem I mentioned or otherwise.

Thanks in advance,
Michael

User 21559723-Jul-07 18:21

Re: Error reading COM object [modified]

23-Jul-07 18:21

MAW30 wrote:
Previously someone here asked about the following:

why the Exception Retrieving the COM class factory for component with CLSID failed due to the following error: 80004005. occurs how to resolve this.

The response was to look at the constructor of the COM object if posible

I mentioned about looking into COM coclass constructor because -
Few months back, the application I was once working on, was calling a COM object created in VB6. Now although the component was registered I got a standard COM error, if I am not wrong it was "Class not registered" error.
After a lot of digging in, I looked at VB6 code and found out that the constructor was raising an exception but somewhere in the process this error was mapped to "Class not registered". The reason for raising an exception was that some environment variable was not set.

MAW30 wrote:
Other people have no problem reading this COM, could I be having a problem because my OS and IDE are both 64 bit and I am trying to read a VB6 COM object.

Likely, I do not have 64-bit PC with me at the moment so can't tell you exact results. VB6 COM component being 32 bit is likely to be the cause. It will help if you can have 64 bit version of same component. How do you run your application - from commandline or explorer? I have seen some VBScripts failing because wrong version of CScript.exe was executed because of the flavor (32 bit / 64 bit) of command prompt.

Sohail

modified 21-Apr-21 21:01pm.

MAW3023-Jul-07 20:07

23-Jul-07 20:07

This was my exact message below:

Retrieving the COM class factory for component with CLSID {31C0BC9B-2250-4964-A582-BA03058BAC93} failed due to the following error: 80040154.

Though when I look in the registry it is there.

I do not have access to the code nor will I be able to get the COM in a 64 bit version. What do you suggest I do. Is it possible to setup a Library as 32 bit where the rest of the solution is in 64 bit.

Thanks,
Michael

-- modified at 2:36 Tuesday 24th July, 2007

User 21559723-Jul-07 20:59

23-Jul-07 20:59

MAW30 wrote:
Retrieving the COM class factory for component with CLSID {31C0BC9B-2250-4964-A582-BA03058BAC93} failed due to the following error: 80040154.

Though when I look in the registry it is there.

HRESULT 80040154 = REGDB_E_CLASSNOTREG - is what I was talking about

MAW30 wrote:
I do not have access to the code nor will I be able to get the COM in a 64 bit version. What do you suggest I do. Is it possible to setup a Library as 32 bit where the rest of the solution is in 64 bit.

I would suggest, make a sample application to use your COM component. This application must be 32-bit. Test.

Also, as I mentioned earlier, does your component require you to do some initial setup in registry etc? If yes, then check wether you have everything in place. You could monitor registry using Sysinternals RegMon tool[^].

If I were you, I would first try compiling my application as 32-bit and use the COM component. This will help identify whether the problem is because of 32bit 64bit portability.

Sohail

modified 21-Apr-21 21:01pm.

Mike Dimmick24-Jul-07 2:08

Mike Dimmick

24-Jul-07 2:08

Error code 80004005 is the generic COM error code E_FAIL. Most likely the class is registered properly, but the DLL's DllGetClassObject function returned E_FAIL.

Stability. What an interesting concept. -- Chris Maunder

MAW3024-Jul-07 16:23

24-Jul-07 16:23

The following is the results I get from a test I ran for RegMon, therefore it does not see the class as being registered at all.

This is the Regitry Monitor result (RegMon reported it NOT FOUND 3x before I received the error message)
72.23125458 MBTest.vshost.e:2632 OpenKey HKCR\CLSID\{31C0BC9B-2250-4964-A582-BA03058BAC93} NOT FOUND

This is the Registry entry under Software
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{31C0BC9B-2250-4964-A582-BA03058BAC93}

I also tried Late Binding and it said the file was not found.
I will work on a 32 bit program and see if that works.

Michael

MAW3025-Jul-07 14:42

25-Jul-07 14:42

I resolved this problem by setting the Platform from Any CPU to x86.

Thanks for the help,
Michael

User 21559725-Jul-07 20:32

Really basic Automation question

25-Jul-07 20:32

MAW30 wrote:
Platform from Any CPU to x86

That's what I meant when I said 32-bit version of your application.

Sohail

modified 21-Apr-21 21:01pm.

hairy_hats23-Jul-07 4:26

hairy_hats

23-Jul-07 4:26

I'm sure this is really basic, but if I create a Document using a COleDispatchDriver-derived interface, how can I keep that Document open after the program that created it closes?

Re: Really basic Automation question

User 21559723-Jul-07 5:28

Re: Really basic Automation question

23-Jul-07 5:28

I am not too sure about this, but you can implement a solution using an extra AddRef-Release from withing Document

Sohail

modified 21-Apr-21 21:01pm.

Roger Broomfield2-Aug-07 21:22

Roger Broomfield

2-Aug-07 21:22

It depends on the Application you are automating.
For example automating Word you just call word_application.SetVisible(TRUE) but for Excel you should call excel_application.SetVisible(TRUE) followed by excel_application.SetUserControl(TRUE) and of course dont call Close() on the document.

Accessing COM component from JScript

PriyaJ.220622-Jul-07 23:36

22-Jul-07 23:36

I have a COM component. I want to access the component through a HTML file. I'm trying to create COM object using Java Script. Can anyone tell me how to do this?

Thanks,
Priya

User 21559723-Jul-07 0:53

23-Jul-07 0:53

Does XMLHttp Example[^] help?

Sohail

modified 21-Apr-21 21:01pm.

PriyaJ.220623-Jul-07 2:01

23-Jul-07 2:01

Thanks Sohail.But still i'm able to access a function within the script. To access a component method i need to create a com object in the script. How should i go about creating a COM object?

User 21559723-Jul-07 5:22

23-Jul-07 5:22

The link I provided has a sample JavaScript code to create XMLHttp object and call its methods.

Following is the syntax of creating XMLHttp object
var xmlhttp=new ActiveXObject("Microsoft.XMLHTTP")

where "Microsoft.XMLHTTP" is the version independent ProgId of XMLHttp COM Component.

In your case, replace "Microsoft.XMLHTTP" with your components ProgId.

The above said, is example of creating COM objects in IE. For Mozilla refer the same link and the example.

Sohail

modified 21-Apr-21 21:01pm.

PriyaJ.220623-Jul-07 17:16

23-Jul-07 17:16

Ya I have tried doing this, but when I create an ActiveXObject it throws an error which says "Automation server can't create object", when I searched through the net I got to know enabling "Initialize and script activeX controls not marked as safe" in IE solves this error. But after enabling this I'm getting a Undefined error. This made me think there should be some other way of creating my com object. When I try creating a wscript.shell object it works fine. I get a problem only when i try creating my COM object.
Priya

User 21559723-Jul-07 18:00

23-Jul-07 18:00

PriyaJ.2206 wrote:
"Initialize and script activeX controls not marked as safe" in IE solves this error

Yes, I read about this.

PriyaJ.2206 wrote:
But after enabling this I'm getting a Undefined error.

What is the error number and description? Do you get undefined error when creating object or calling its method?

Sohail

modified 21-Apr-21 21:01pm.

PriyaJ.220623-Jul-07 19:08

23-Jul-07 19:08

Its IE script error dialog, it shows line number, code no. as 0, error as "Unspecified error". The line number which is shows in the line at which object is created ie. var obj = new ActiveXObject("MyComponent.MyComponentObj").
Error occurs at creating object line.

Priya

User 21559723-Jul-07 19:57

23-Jul-07 19:57

What version of IE are you using?

Sohail

modified 21-Apr-21 21:01pm.

PriyaJ.220623-Jul-07 19:58

23-Jul-07 19:58

IE6

Priya

User 21559723-Jul-07 21:01

23-Jul-07 21:01

Does the following sample work in your browser (It works fine on my IE6 browser)

<html><br />
<head><br />
<script type="text/javascript"><br />
var xmlhttp;<br />
<br />
function testXMLHttp()<br />
{<br />
xmlhttp=null<br />
// code for Mozilla, etc.<br />
if (window.XMLHttpRequest)<br />
  {<br />
  xmlhttp=new XMLHttpRequest()<br />
  }<br />
// code for IE<br />
else if (window.ActiveXObject)<br />
  {<br />
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP")<br />
  }<br />
if (xmlhttp!=null)<br />
  {<br />
  alert("Your browser does support XMLHTTP.")<br />
  }<br />
else<br />
  {<br />
  alert("Your browser does not support XMLHTTP.")<br />
  }<br />
}<br />
</script><br />
</head><br />
<body onload="testXMLHttp()"><br />
<br />
</body><br />
</html>

Sohail

modified 21-Apr-21 21:01pm.

PriyaJ.220623-Jul-07 21:08

23-Jul-07 21:08

Thanks Sohail,
Actually when i was trying to fix it up, I came to know that the problem is only when accessing my component. I tried creating another simple component and accessed it by creating object through ActiveXObject, it works fine.

I'm creating a CAxWindow object and embedding the html content into a toolbar using CAxWindow's create control method. Now I doubt whether creating a CAxWindow causes the actual problem.

Priya

User 21559723-Jul-07 21:16