Sometimes after modifying a patch containing one of the IEMGUI objects (Number2, Vslider, Hslider, Vradio or Hradio), I'm no longer able to edit the properties. If I try to open the properties window (either in edit mode or run mode, it doesn't matter), I get a Tck/TK error like the one below. The object still works in run mode, but I can no longer edit the properties. When this happens I usually end up deleting it and creating it all over again, which works but is rather frustrating and time-consuming.
I'm running Pd v0.51..3 under Windows 7 (64-bit), but this has always been an issue, ever since I started using Pd several years ago. I think I've seen it happen under Linux as well, although I haven't been using Linux much lately. Does anyone know what causes this error?