The parent of additional control was not found on the base form

In a project with more than 3 ISV solutions installed we encountered the following compile error from time to time while updating to a new version of ISV Solutions:

[AxFormExtension/EcoResProductDetailsExtended.ourOwnExtension/Controls/FormExtensionControlnhogurxf1/Parent]:The parent 'ButtonGroupNameFromISV' of the additional control 'FormExtensionControlnhogurxf1' was not found on the base form.

This error message was thrown while compiling one of our own models which had a reference to the ISV model. Note that both the ISV model and our model have FormExtensions on the same form.

Can you suggest what can be done here to resolve theissue.

Thanks in advance!!