•A. High Cardinality is set in InfoObject B: This is an object property that prevents you from changing InfoObject B into a navigational attribute for InfoObject A. A characteristic with high cardinality cannot be used as a navigation attribute for another characteristic, and therefore it cannot have navigation attributes itself12.
•B. Attribute Only is set in InfoObject B: This is an object property that prevents you from changing InfoObject B into a navigational attribute for InfoObject A. A characteristic that is marked as an exclusive attribute can only be used as a display attribute for another characteristic, but not as a navigational attribute. In addition, the characteristic cannot be transferred into InfoCubes34.
•D. Conversion Routine “ALPHA” is set in InfoObject A: This is an object property that prevents you from changing InfoObject B into a navigational attribute for InfoObject A. A characteristic that has a conversion routine cannot have navigational attributes, because the conversion routine would have to be applied to the navigational attributes as well, which is not possible5 .
References:
•1 https://help.sap.com/docs/SAP_BW4HANA/107a6e8a38b74ede94c833ca3b7b6f51/f851415842154e59a5f038e458b97a0b.html
•2 https://help.sap.com/doc/saphelp_nw75/7.5.5/en-US/f8/51415842154e59a5f038e458b97a0b/content.htm
•3 https://help.sap.com/doc/saphelp_scm700_ehp02/7.0.2/en-US/63/f3c416bcbf4730bb86e62ef8a54e17/content.htm
•4 https://answers.sap.com/questions/1149854/difference-display-attribute-and-navigational-attr.html
•5 https://help.sap.com/doc/saphelp_nw75/7.5.5/en-US/42/f93a83ae5546d3a7cfd7ff09e25a2b/content.htm
•https://answers.sap.com/questions/10121838/infoobjects-attributes.html
