PRB: Err "Unable to find Visual Class Library" in Project

ID: Q216087

The information in this article applies to:

SYMPTOMS

If the _Utility Visual class library is added to a project, the following error message displays when the project is built:

Unable to find Visual Class Library.


CAUSE

The _xtab Visual class in the _Utility Visual class library contains some method code that uses the NEWOBJECT() function to create a new class from the _GENXTAB system variable. The _GENXTAB system memory variable is referencing the Vfpxtab.prg program file.


RESOLUTION

Open the _xtab Visual class in the _Utility Visual class library, which is located in the \FFC folder. Once the _xtab class is open, open the Runxtab method. Change the following line of code:



oNewXtab=NEWOBJECT('genxtab',(_GENXTAB),"",;

Replace the _GENXTAB to point directly to the VFPXTAB program. For example:


oNewXtab=NEWOBJECT('genxtab',"Home()+"vfpxtab.prg","",;


MORE INFORMATION

If you choose the Ignore or Ignore all options from the error message, the project continues to build. If you choose the Locate option and add any Visual class library to the project, whether it is the correct Visual class library or not, it will be added without being checked if it already exists in the project. Therefore, you could end up with multiple instances of the Visual class library in the project, and it does not prevent the error from occurring on the next build.

Steps to Reproduce the Error

  1. Create a new project, add a form and then modify the form.


  2. From the Tools menu, choose Component Gallery.


  3. Locate and open the Foundation Classes folder.


  4. Open the Automation folder and add the Graph by Record class to the form.


  5. Save and close the form.


  6. Build the project.



REFERENCES

(c) Microsoft Corporation 1999, All Rights Reserved. Contributions by Dean Christopher, Microsoft Corporation.

Additional query words: 


Keywords          : kbVFp600bug kbFFC 
Version           : WINDOWS:6.0
Platform          : WINDOWS 
Issue type        : kbprb

Last Reviewed: February 9, 1999