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Editorial Team
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Asked: 2026-06-18T01:32:32+00:00

There already is a working WAMP instance in a Windows 7 in which the

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There already is a working WAMP instance in a Windows 7 in which the line

$x = new COM("X");

does instantiate a COM object.

I was trying to locate a bug, and decided to use a fresh new WAMP installation on the same Windows 7 system as the previous one.

In the new one, the same line produces:

Failed to create COM object 'X': Class not registered ( Error code: 0x80040154 )

Now, since the first WAMP comes with it’s own installation application (along with its DLL which holds the COM class) I can’t exactly figure out what I need to change in the new WAMP so the line above will instantiate the object.

  • My WAMP version is: 2.2 and
  • Apache version : 2.2.21
  • PHP version : 5.3.10

Any idea what I need to set up properly?

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1 Answer

  1. Editorial Team

    Managed to solve the problem by changing the working directory (using chdir) to be the same as the php.exe just before $x = new COM("X");.

    I think the DLL wasn’t propery registered, or lacked something in itself.

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