This error code will be returned, for example, if you provide an unrecognised or invalid value for physical_form when creating a new shipment:

  {
  "dangerous_goods": {
    "physical_form": "plasma"
  }
}

The valid values for physical_form include:

ValueDescription
gasThe goods are in gas form
liquidThe goods are in liquid form
solidThe goods are in solid form
otherThe goods are in some other form (i.e. not liquid, gas, or solid)