Since ArchiCAD 10 the interpreter is nagging, thet there are precision problems, when comparing real type values by "=". You have to substitute by equal expressions.
!*** Compare real type values tlr=0.001 !---> Prüfung: NOT(ABS()>0) NOT(ABS()>tlr)
ABS()>tlr ABS()>0 NOT(ABS()>0)
ABS( A - B )>tlr ! A<>B ABS( A - B )<tlr ! A=B A - B < tlr ! A<=B A - B <-tlr ! A<B B - A > tlr ! A<B B - A < tlr ! A>=B B - A <-tlr ! A>B A - B > tlr ! A>B