If both USER FATAL MESSAGE 6775 (SEPLOC) and USER FATAL MESSAGE 7523 (SEPMAB) appear please check the correctness of the connection node IDs of the SE and system model, especially the three non-colinear points defined in SELOC.
If both USER FATAL MESSAGE 6775 (SEPLOC) and USER FATAL MESSAGE 7523 (SEPMAB) appear when running system model containing superelement model please check the correctness of the connection node IDs of the SE and system model, especially the three non-colinear nodes defined in SELOC. The three non-colinear nodes will have different pair of IDs in the system and in partitioned superelement models, but they have to be referring to the same node (locations).
Please make sure that there are no update pending nor conflicted ID's in all of the subassemblies: that might cause confusion in the ID generation in the upper/top assembly/simulation level.