You can download this HotFix from TIBCO Support Portal (https://support.tibco.com). You will need to provide your TIBCO Support Portal credentials. Once logged in you can the download the hotfix by selecting the “Downloads” -> “Hotfixes” option. Then go to the AvailableDownloads/BusinessWorks/6.3.5/hotfix-06.

================================================================================
Closed Issues in 6.3.5_HF-006 (This Release)

AMBW-28929
The Use Null For Empty Values check box has been added to the Request tab and Use 
Empty Values for Null check box has been added to the Response tab of REST Service 
Binding. Use Empty Values for Null check box has been added to Request tab and 
Use Null for Empty Values has been added to Response tab for REST Reference Binding.

Additionally, the Use Null For Empty Values has also been added to the General tab 
of the Parse JSON activity and the Use Empty Values for Null check box been added 
to the General tab of Render JSON activity.

Users can now decide if nil values in XML needs to be treated as null or empty in 
the converted Json. By default the checkbox is unchecked, that is, nil attributes in 
XML are treated as null. 

AMBW-28870
Users were unable to set the module property for the field HTTP Client Name in the
SOAP Reference Binding.
 
================================================================================