TI-API:endCustomerCompanyName

Part Number: TI-API

1.endCustomerCompanyName is omitted, the following error occurs
  Set value
{
"quote": {
"checkoutProfileId": "1BB",
"requestedUnitPriceCurrencyCode": "USD",
"lineItems": [
{
"tiPartNumber": "SN74LS00N",
"quantity": 2500,
"requestedUnitPrice": 1.2
}
]
}
}

  Error Description
"errors" : [
{
"errorCode" : "ERR-BKG-QUOTE-API-0001",
"type" : "ERROR",
"reason" : "Missing endCustomerCompanyName",
"message" : "endCustomerCompanyName cannot be null or empty. Enter a valid endCustomerCompanyName and resubmit request."
}
]


2.Adding the endCustomerCompanyName line causes a system error.
  Set value
{
"quote": {
"checkoutProfileId": "1xxxx",
"requestedUnitPriceCurrencyCode": "USD",
"endCustomerCompanyName": "TOKYO ELECTRON DEVICE NAGASAKI",
"lineItems": [
{
"tiPartNumber": "SN74LS00N",
"quantity": 2500,
"requestedUnitPrice": 1.2
}
]
}
}

  Error Description
Processing was aborted because an error occurred while executing the Web API request.
and no clear error is returned.

I would like to know how to deal with this.

[TdEtDc]