The transaction you are trying to build is probably made up of many small transactions, making the transaction too large in size, not the amount you are trying to send but rather the shear amount of transaction inputs.

Try sending a smaller amount or you will have to send a few transactions to yourself to create a larger sum thus reducing the amount of transaction inputs.
Its much easier to do this with the MUEcore wallet with coin control in the sending tab, but try with smaller transactions to see if that works from the cli.