When are new SuiteTalk WSDLs generated?

The correct answer identifies that new SuiteTalk WSDLs are generated only when there is an update to the WSDL. This means that any time there is a modification applied to the web services, such as changes in existing records, new features, or improvements to the API, a new WSDL file is generated to reflect those updates.

The WSDL (Web Services Description Language) file serves as a contract between the API and the applications that consume it, outlining the available operations and data types. Therefore, generating a new WSDL upon updates ensures that developers have access to the most current information regarding how to interact with the SuiteTalk services effectively. This is crucial for maintaining proper integration and functionality as the platform evolves.

When considering the other options: new WSDLs are not automatically generated with every custom record created, as this would lead to an overwhelming number of WSDLs that could undermine system performance and usability. Additionally, generating new WSDLs solely during system upgrades would neglect the need for updates that may occur independently of a full system upgrade. Lastly, creating WSDLs on a fixed schedule, such as every month, would not account for the dynamic and on-demand nature of software development and changes within the NetSuite environment.