CE 7.3: Mapping activity issue

Hi there,

I have a mapping activity where I fill one attribute "Reason" using the following expression:

IF(isSet(Status/DeclinedBy),concat("Reason: ",Status/DeclinedReason),"")

If "Status/DeclinedBy" is filled, the attribute "Reason" is filled correctly, if not, my process always stops in that mapping activity (without any error message in the log).

What can be the reason for that?

To me it seems that the mapping in BPM is still quite buggy at the moment.

Thanks in advance!