Hi, 
You could make a clone of the dialog where u want to return to. On a button
click execute the CA and set a public property there if directory is valid.
then goto <new dialog> if property is set otherwise goto cloned dialog .
execute CA after button click from clone dialog. check for property . go
back to original dialog if property is nt set(invalid directory). Its kind
of toggle between two dialogues based on property value.

Regards,
Sampat



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