Knowledge Base

BUG: Class Not Released After Being Deleted From Form

Article ID: 191311

Article Last Modified on 12/11/1999

APPLIES TO

This article was previously published under Q191311

SYMPTOMS

Attempting to modify a class library, a .vcx file, can cause the following error to occur after you delete it from a form:
Cannot modify a class that is in use.

CAUSE

A reference to the class library remains in memory after deleting the object from the form.

RESOLUTION

Close the form before modifying the class.

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This behavior does not occur in Visual FoxPro 6.0.

MORE INFORMATION

Steps to Reproduce Behavior

  1. Create a class based on a Command button and name it Ztest. Save it to a class library named Ztest.vcx.
  2. Create a form and add the Ztest command button to the form.
  3. Click the Ztest Command button class and delete it from the form.
  4. With the form still open, attempt to open and modify the Ztest class library, and the error occurs.

Additional query words: kbVFp500abug kbDesigner kbvfp500a kbVFp500bug

Keywords: kbbug kbnofix KB191311


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