# 4630 Rebuilding the Component Library with a Standalone Form Open Can Cause AV

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I modified the three interfaces for TCheckBox so that the captions appear to the left of the icon.

If I insert or remove the path for the modified interfaces in the Search Paths of the Component Library in Environment Options and EWB rebuilds the library while a form is opened, it will AV if I attempt to drop a TCheckBox on the form.

I have to use Task Manager's End Task button to close it.

If I restart EWB and then drop the TCheckBox, there is no problem.

The following steps will cause the AV when I do not have the modified interfaces directory in the search path:

1. Start EWB.
2. Close any projects.
3. Create a new visual form.
4. Add the modified interface directory in Environment Options, just above EWB's default interface path.
5. Allow rebuild of the component library.
6. Attempt to drop a TCheckBox on the form.
7. EWB AVs.

The following steps will cause the AV when I have the modified interfaces directory in the search path:

1. Restart EWB.
2. Close any projects.
3. Create a new visual form.
4. Remove the modified interface directory in Environment Options.
5. Allow rebuild of the component library.
6. Attempt to drop a TCheckBox on the form.
7. EWB AVs.