We distribute several R applications using the tcltk package on different 
servers or PC (Windows XP). On some machines and in a not reproducible 
way, all the R windows disappear when using functions like tkgetSaveFile 
or tkchooseDirectory. The R application remains open (the Rgui.exe 
processus is still available)!
Despite several tests, we can not identify the origin of this problem 
which seems independent of the R version! 
Have you any ideas? Are there any compatibility issues between the tcltk 
package and other applications?


Jérémy 
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