When changing the standard rule symbols with their Express equivalents in ARIS Architect, Business Simulator gives "invalid sequence flow" error. When replaced again with the original symbol, everything works fine. It seems that Simulator does not understand Express language yet and for example AND Rule is understood only if with SymbolType ST_AND (or ST_OPR_AND_1) and not with the new "Express" AND Rule (GUID dfffb990-6c52-11de-78c8-9fd61b0df263).
