The DSS GUI lets you create batch challenges for multiple securities:

Is there a way to achieve this using the REST API? From the looks of it, the API only allows one security to be challenged per request:
https://hosted.datascopeapi.reuters.com/RestApi.Help/Context/Entity?ctx=AskTrps&ent=Challenge&sce=Ask%20TRPS%20-%20Create%20-%20Tolerance%20Challenge&tab=0