From a quick search, the main suggestion is a missing field for a controlsource.

Thread #522672
Thread #626745
Message #585547

>Any ideas - I have been happily created classes of forms with buttons and textboxes - then instantiating them with createobject - but now after finishing a pretty full form I get the error "Error Instantiating the object" - no other reference - I cleaned up the project and tried a build - I got a message saying it could not locate generic_classes (that totally phased because that is a set of classes I have not used in ages and have nothing to do with this project)
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>I have made sure all the classes I am using are in the one class.vcx - I have tried looking in the memo field in the vcx for the location of the baseclass? all point to the right class... I also tried packing the vcx...
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>Please any idea?
>Why does this happen? - I have a vague recollection of it happening before...