ListUserGroup error

[mosys]

In the Java LAPI, the following code using the ListUserGroup method gives an error:
"get(name) not implemented for this datatype".

Does someone have sample code calling ListUserGroup() that works correctly?

LLValue userRecords = new LLValue();
int maxRows = 5000;
int startId = 0;
int groupid = 5306;
String start = null;
LLValue searchParams = new LLValue();
searchParams.setAssoc();


searchParams.add("TargetType", lapiUsers.GROUP);
searchParams.add("SearchType", lapiUsers.ANY);
searchParams.add("SearchValue", "DC"
searchParams.add("Action", lapiUsers.NEXT);
searchParams.add("SearchColumn ", lapiUsers.NAME);
searchParams.add("SearchOpr", lapiUsers.STARTSWITH);

int status = lapiUsers.ListUserGroup(maxRows, startId, start, groupId, searchParams, userRecords);