can somebody explain why i'm having trouble sending my coins from my wallet to an exchange?  it's giving me the following message

 {
    "id": "opid-df2c6b54-0fd9-4b6d-9d0c-ab985ac18e83",
    "status": "failed",
    "creation_time": 1528328017,
    "error": {
      "code": -26,
      "message": "16: bad-txns-oversize"
    },
    "method": "z_sendmany",
    "params": {
      "fromaddress": "s1hyqGKa9Lq1FsomCQmVuLLNLCXgfb26Ekj",
      "amounts": [
        {
          "address": "s1QMUUpDXv7LESBPmaT2qdcUmGumD7JNTd1",
          "amount": 100
        }
      ],
      "minconf": 1,
      "fee": 0.0001
    }
  }