Java method not working - getDatatables

I'm trying to write a Java function that searches the external catalog using the method getDatatables:

//get the datatables matching the specified partnumber

Condition condition = new SimpleCondition("part_number", "eq", value);

Condition[] conditions = {condition};

Iterator components = design.getDatatables(conditions, true, true);

The third parameter in the getDatatables call is supposed to search the external catalog, but unfortunately I'm getting a NullPointerException when trying to read a central catalog file:

java.lang.NullPointerException

        at rsdesigner.design.DatatableCCSearch.readFile(DatatableCCSearch.java:177)

        at rsdesigner.design.DatatableCCSearch.readCCFiles(DatatableCCSearch.java:110)

        at rsdesigner.design.DatatableCCSearch.readCCFiles(DatatableCCSearch.java:103)

        at rsdesigner.design.DatatableCCSearch.readCCFiles(DatatableCCSearch.java:103)

        at rsdesigner.design.DatatableCCSearch.findCCDatatables(DatatableCCSearch.java:76)

        at rsdesigner.design.Design.getDatatables(Design.java:227)

I'm using Creo 2.0 M010. Does anyone know if it's fixed in a later build of 2.0, or in 3.0?

What's worse is that I do actually get at least one PropertySet returned but it seems to be incomplete, so I can't actually scan the results anyway!

Thanks

Martin