Recently I meet a problem, the other is made of PB group moved to a new system, PB is always display object expired, empty reference objects such as errors, for displaying the error I have redefined the empty object, but still to such mistakes, consult each master to guide me!!

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The other made of PB group moved to a new system, PB always display object expired, empty reference object such as error
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Version are consistent?
After moving, recompile, and after you move in the past, whether also involves in the original parent class?

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