Devs are not working on this. You need a better understanding of the protocol. There are too many input transactions to make up your amount, by around 4 times too many. Try sending a quarter of that amount, or even less, at a time. Try wallet comand "incoming_transfers available" to see the list of incoming transactions. You have too many small inputs. You need to consolidate them into bigger transactions. You can send them to yourself if you like to do it that way.
Why did you decide that devs are not solving this problem? I'm strongly convinced that BCN developers are continuously supporting their technologies. Maybe this problem is quite tough and it will be solved later.
No they will not fix it. The same happens with bitcoin. Try not to generate those small inputs, if you are mining on a pool with small payouts change pool or if it is manual get bigger payouts.
based on his screenshot he is trying to send coins from his wallet to an exchange, has nothing to do with pool payouts.
Like I said I am able to xfer 2,000,000 or 1,000,000, or 500,000, sometimes it takes multiple try's but eventually it does go through, and yes it is a known issue.
the smaller amount of coins you try to transfer the better so if you are having issues and it won't go through just lower the amount you are trying to transfer.