Why Invalid Custom Field Error when sending Quote to Zuora?

[Jyoti_Sinha]

In a specific scenario customer created custom field in both in Salesforce: Quote and Zuora: Subscription. The custom field was also added to the quote fieldset: zqu__CustomQuoteFields

Please check the reason and solution for the error.

[Jyoti_Sinha · Accepted solution]

There was a mismatch in the AOI name of the custom field in Zuora and Salesforce. Since custom field is case sensitive, it caused a difference. Once the API name was matched completely(case as well), the error was resolved.