Hi Akki,
I have tried the following code, but worked fine in both Origin 2016 and Origin 9.1 (Sorry, I don't have 9.2 in my machine.):dend$="13/06/30";
tend$="11:00";
colmask irng:= col(A) cond:= gt val:= date(dend$+ " " +tend$); wdelrows method:=2;
Not sure what went wrong in your application.
Maybe you can check the current active window, name of the column, arguments of the colmask, etc.?
--Hideo Fujii
OriginLab