Rhino Usage Warning message for Query Builder

Good Day!

What is the meaning / severity of this error?

RHINO USAGE WARNING: Missed Context.javaToJS() conversion:

Rhino runtime detected object com.servoy.j2db.querybuilder.impl.QBJoin@adfd76 of class com.servoy.j2db.querybuilder.impl.QBJoin where it expected String, Number, Boolean or Scriptable instance. Please check your code for missing Context.javaToJS() call.

What causes this warning? Is an empty join being made on a table?

Thanks!
–Joe.

Anyone have info on this warning and its impact?

Do you have a sample that shows this?