If you are talking about the fees for running the bankruptcy, it is not usual for these to be paid from the IVA funds, as these are generally held in trust for the IVA creditors and thus ringfences from the bankruptcy proceedings.
The costs of bankruptcy are generally indemnified from the estate assets. If there are no assets, these are generally funded from the public purse if the OR is appointed, or by the IP personally if they have been unfortunate to be appointed over an asset-less case. This seems to happening more and more now - I am continually writing time off in my bankruptcy portfolio which cannot be recovered.