Read Master Data in Transformation

Hello Hi,

I have a question about "Read Master Data" in Transformation.

I have an infoobject say, zMainObj with another infoobject zAttrObj as a navigation attribute. I have loaded the data and activated without problems.

And in the DSO, i have both zMainObj and zAttrObj, but in the source, i only have zMainObj data.

So, I have setup the rule "Read Master Data" in transformation to read the master data of zMainObj and get the value of zAttrObj.

I checked the rule and it has no errors and i tested it, it is able to give me the correct value of zAttrObj if i pass the value of zMainObj.

However, after i execute the DTP and activate the data, only zMainObj has data but not zAttrObj.....

May I ask why and any ideas would be appreciated.

Thanks and Regards,

Matthew.