ARERR [9984] RegularQuery parameter cannot be empty.

AR System Message Catalog

Product:: AR System server
Description:: Server messages
Type:: Error
Number:: 9984

The RegularQuery parameter of the getListEntryObjects function (Java API) is NULL. Provide a valid instance of the RegularQuery object and retry the operation.
For more information, see these documents:

C API Reference, which includes information about the ARGetListEntryWithMultiSchemaFields function and its Java class diagram
Java API online documentation