Send error "Insufficient funds" when balance is adequate

[JaiDeeEye]

Hi - Trying to make a first payment transaction from my new Electrum wallet.

Funds went in OK, but now unable to buy KoCoin with "Insufficient funds" popup error when I try to review the TX.

Nevertheless, my balance shows (at the bottom status bar) at double the amount I am trying to spend to buy 5 KoCoins. 

Is there another way to confirm payment success  of Electrum with a trivial amount? 

Any thoughts?

Note that I have copied the wallet and am using a copy.

TIA for clues...

[MrCMiner]

Pretty sure I have the same issue, downloaded the Electrum wallet from the page that the Multibit twitter page provided when saying they are shutting down. So this is a backup of the Multibit wallet. Since downloading it, all transactions were working fine up until now with a fee rate of approx 750 sat/byte (within 5 blocks). It shows the total sum on the bottom, but when trying to send another transaction, filling in the price, being far lower than the total amount (not even 1/8 of the sum), I get the message on the bottom saying "Not Enough Funds". Is there a fix to this? Tried restarting the program multiple times and lowering the fee but still no luck, the amount I can send now is far less than the total amount showed on the bottom screen.
Any help or suggestions would be greatly appreciated, thanks.

[HCP]

Have a look at your "coins" tab in Electrum (View -> "Show Coins") and see how many "coins" are listed as making up the balance of your wallet. If you have a large number of "small amounts" that would explain why you cannot send very many... the transaction fees at the moment are ridiculous... pretty much EVERY input you use is going to cost at least 100,000 sats to send (700 sats/byte fee * 148 bytes = 101,500 sats)... that is 0.001 BTC just to SEND each input!!?!

So, if you have a lot of coins listed that are less than 0.001 BTC (1 mBTC or 100,000 sats)... it will actually cost MORE to send these coins that what they're worth!

You only option is to lower the fee, but doing that means that your transaction is likely to get "stuck" and take a long time to get confirmed