Run RSA6 on an EBP system, located the activated 0BBP_PROD_HIER, right click it and then select Test Extraction, instead of going to a general extraction program selection screen, it goes to a screen called "BW Hierarchy Extraction: Display Catalogs", there are two hierarchies listed, 1st one is called R3MATCLASS and 2nd one is called R3PRODSTYP, select the 2nd one, then click one of the top three buttons called "Display tree", can see an error msg listed at the status bar that is:
Error calling function COBW_HIERARCHY_TRANSFER_PRCA for hier. catalog in source system -> 326
Message no. R8462
Anyone's idea is greatly appreciated on how to reslove this error and you will be rewarded!