[firebase-br] FireBird 2.1.18118 Loucura!?

[Mário Reis]

Na sequencia da loucura antes reportada fui tentar um backup e:

gbak:    writing data for table COBRANCAS_H 
Error: Failed: Unsuccessful execution caused by a system error that precludes
successful execution of subsequent statements.
Internal gds software consistency check (decompression overran buffer (179), 
file: sqz.cpp line: 231).
 gds_$receive failed.
Internal gds software consistency check (can't continue after bugcheck).

Alguem me diz como posso resolver isto?
Obrigado 

Mário