Data Maintenance Batch Job for OE Service Object

Hi,

I am using a private cloud version of  Rollbase 3.1.3 and have created an OE service object. I am currently trying to set up a data maintenance batch job.

I create a new batch job; select type - data maintenance; choose my OE Service Object; fill in the details.

When the batch job to runs all I seem to receive is an email with the following error:

Error loading query : In getSelectQuery() ==> m_selectQuery==null

If I choose the option to Run now I also receive the same error. It doesn't really matter what is in the object script, even with something simple like this:

var aTest = "";

Does anyone have any ideas as to how I might get this functioning?