XCLN: Run-Time Error 424: Object Required Form Error (161658)

SUMMARY

When you attempt to open a form in the Microsoft Exchange client that has been extended in 16-bit Visual Basic 4.0 to access an external Microsoft Access database, you receive the following error:

Runtime error - object error 424

NOTE: This error does not occur on the computer used to design the form.

This problem is resolved if you install the Microsoft Exchange Server Forms Designer or Visual Basic on that client computer. This is because the DLLs required for accessing the Microsoft Access database need to be copied and registered to work correctly. Merely specifying the copied DLL in the form's .cfg file does not register the DLL correctly. The process of installing the Microsoft Exchange Server Forms Designer or Visual Basic does this during the Setup process.

MORE INFORMATION

The Dao2516.dll file cannot be copied over to the computer and be registered correctly. To correctly register it, you must do the following:

Have all the necessary DLLs copied over to the computer, by using the .cfg file.
Copy over the Regsvr.exe file, or run it with the following command-line switch:
REGSVR DAO2516.DLL
This command registers the DLL correctly; after doing this the form will not give the runtime error.

NOTE: To correctly register the Dao2516.dll file you must also have all of its supporting files on the client computer. The following files also needed for the registration process to work correctly:

Vaen21.olb
Msajt200.dll
Msjeterr.dll
Msjetint.dll
Vbajet.dll
Vbdb16.dll

You must decide when and how to run Regsvr.exe to register the DLL. Running Regsvr.exe is the only way to register the DLL short of installing an application that runs the Setup Wizard, and in turn registers Dao2516.dll.