Version 9 of JMP has a function SAVE LOG which does what the name suggests. So you could use CLEAR LOG then perform the SHOW function and then save the log file, although it would be someone perverse to do. Typically SHOW is used just for diagnostic purposes. You have the result in the EX1 variable. You could therefore create a new JMP table and save the result to the table, or use the SAVE TEXT FILE function to save the result into an external text file.
-Dave