Kernrechtsfrage
Whether the insured person's failure to attend the psychiatric examination in Basel was culpable and unexcused under Art. 43 ATSG and Art. 73 IVV.
Extrahierter Entscheid
The refusal was excusable; it did not amount to a culpable breach of the duty to cooperate.
Extrahierte Begründung
The medical file showed a complex psychiatric condition and a fragile, unstable personality. In the concrete circumstances, the travel and examination requirement in Basel was a disproportionate burden and the insistence on that location lacked convincing justification.