# Common Errors

This section describes the common errors(assertions) on placing/submitting new orders and cancelling exiting orders.

**Place Order Errors**: Below are the common errors occurs during the verification of order submission.

Example of error thrown from `transact`: 

```javascript
 {
   json: {
      code: 500,
      message: 'Internal Service Error',
      error: {
        code: 3050003,
        name: 'eosio_assert_message_exception',
        what: 'eosio_assert_message assertion failure',
        details: [
          {
            message: 'assertion failure with message: Invalid order type',
            file: 'wasm_interface.cpp',
            line_number: 1075,
            method: 'eosio_assert'
          },
          {
            message: 'pending console output: ',
            file: 'apply_context.cpp',
            line_number: 113,
            method: 'exec_one'
          }
        ]
      }
    }
}
```

The above errors asserts whether the order type in place order is valid or not. Since order type is not valid, it will throw an error "Invalid order type"

**Errors list**:

"Contract is paused": Currently the contract is paused and users can't submit orders.

"Market not found": The market is not existed for the submitted order.

"Placing orders is disabled for this market": Order submission is disabled for this market.

"Invalid order type": Order type is Invalid, it should be one of the {Limit(1), Stoploss(2), Takeprofit(3)}.

"Invalid order side": Order side is invalid, it should be either buy(1) or sell(2)

"Invalid price": The price quoted is invalid, it is not within 0 and INT\_MAX

"Minimum order size is ...": Min order size is not valid.

"Invalid order type - add trigger price": Trigger price is not added for stoploss and take profit orders.

"Invalid referrer name, self referral not allowed": Self referral is not allowed.

**Cancel Order errors:**

"Contract is paused": Currently the contract is paused and users can't submit orders.

"Invalid authorization": User is not authorized to cancel the order.

"Invalid order id": The order id is less than or equals to 0, so it's not valid.

"Order not found": The order id which user is intended to cancel is not found or existed

"Accounts mismatch, order cancellation not allowed": The account name provided is different from the account(order placed), so cancellation is not allowed.

"Market not found": The market id, which was referenced by order\_id is not found .