I've searched and didn't find anything relevant, apologies in advance if this has already be covered (as it likely has been).

I am trying to send bitcoins to an address and no matter what I try I get the error "Error: Transaction creation failed." There is no reason given so I am stumped. The wallet shows more than the amount I am trying to send and I've tried increasing the transaction fee to be paid to stupid levels, used previous versions - all to no avail.

Any idea what's going on and/or how to resolve this problem?

Thank you!