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  • $\begingroup$ Actually I don't underand exactly what's going on here, and I doubt that it is doing what probably was intended, although I of course don't know what the intend was and whether this situation was considered at all. On the other hand I think your code has other problems: is it intended that the frontend variable obj will be replaced with an new "instance" of the module variable obj$xxx at every button press? Use get[obj] ^:= {obj, Hold[u], u, Date[]}; to see what I mean. $\endgroup$ Commented Jan 25, 2012 at 21:36
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    $\begingroup$ Changing SetDelayed to Set in the initialization part fixes this issue. It seems that with SetDelayed the first run is just defining makeObject[] without executing it. $\endgroup$ Commented Jan 25, 2012 at 22:40
  • $\begingroup$ @kguler this solution doesn't work though if you want makeObject to have arguments. $\endgroup$ Commented Jan 25, 2012 at 23:16
  • $\begingroup$ @Faysal, you are right. $\endgroup$ Commented Jan 25, 2012 at 23:34
  • $\begingroup$ @Nasser nice comparison, so method 3 is the best, and it keeps the code in the Initialization part, good to know. $\endgroup$ Commented Jan 26, 2012 at 8:17