Enable "Data flow cycle" in Parallel Jobs

Currently "Data flow cycle" are not allowed in DataStage PX as described in the error message IIS-DSEE-TFSR-00035. This maybe is correct for most cases to prevent wrong design, but it would be very usefull when working with parent-child hierarchies. Currently when calculating logic in a multilevel hierarchy you have to implement a lookup stage for each hierarchy level you want to cover, which is even more painfull if you don't know in advance how many steps you need to achive

I want to be able to lookup the parent node and do that again (by reinserting the data into eg a Funnel Stage before the Lookup Stage) until I have reached the Level I want, I have no more parent nodes in my lookup or have reached a certain amount of tries. In a current productive Job i need to lookup 11 times to be sure that i have reached the top node of my hierarchy. In theory no additional stages or Syntax has to be implemnted into the gui, the PX engine just has to be able to process it. I have attached a Picture of the current solution (for five hierarchy levels) with multiple lookups and of the solution which would work if the RFE is implemented (on the left side of the Picture)

Allowing this Kind of "recurisve" logic would simplify the Job logic, not needing to implement the logic for a hierarchy Level again, which reduces implementaion time, possible errors, readability and compilation time. Also the Job would be more performant for less stages mean less startuptime, processes an Memory usage

This Idea has already been entered as an RFE, with a screenshot how the solution would look like

http://www.ibm.com/developerworks/rfe/execute?use_case=viewRfe&CR_ID=81040

https://www.ibm.com/developerworks/rfe/execute?use_case=downloadAttachment&ATTACHMENT_ID=7430