The error means that one of the activex controls used on your form is not present/registered on the computer in question.

>I get the following error message when a customer tries to start my program on one of their computers. 4 others are working just fine right next to each other except this one. It is running Vista just like their others are. All bought around the same time according to them.
>
>My errorlog reports this:
>Error loading file - record number 8. Mainsportsmanform1 or one of its members. Loading form or the data environment : OLE error code 0x80040154: Class not registered
>
>The program will not show the main form and sits there doing nothing basically.
>
>I went to record number 8 on my main class and it refers to a Shape on the form base class. This is not even a subclassed shape, just the default box shape around something on my form. Sounds like it is referring to something not disclosed properly.
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>This is the only computer that has had a problem in thousands of installations.