BPath - Customer Namespace

Hello,

I would like to read a relation that I´ve created via AET using Bpath. Unfortunately I get an exception (CX_WCF_BPATH_PARSING_ERROR).

Short code example:

LR_ENTITY ?= LR_ENTITY->GET_RELATED_ENTITIES_BY_BPATH( 'BTOrderHeader/*$')->get_first( ).
==>possible

LR_ENTITY ?= LR_ENTITY->GET_RELATED_ENTITIES_BY_BPATH( '/XYZ/EXT_BOL_RELAT0001/*$)->get_first( ). ==> error

To my mind the problem is caused by the used customer namespace '/XYZ/'.

So, how can use BPath when using a customer namespace, or is it not possible?

Thanks

Janine