I have a weird issue - when combining many small inputs i'm getting an error message "this transaction requires a minimum fee of at least .1 BTC" - even though I have properly set the fee via settxnfee to a very low sat/byte rate (I'm in no rush). It seems to be forcing a much higher fee rate.

There is nothing fee-specific in the config file, and I can see the proper fee set when i run "getwalletinfo" - where is this "minimum fee" coming from and how do I get around it? - thanks.

Even worse is - if there are additional funds to pay the flat .1 btc rate, it will send the txn with .1 fee overriding my much lower specified fee, with no warning.