Dear IDL users,
I would like to ask hwy variables become "undefined" after an error in
running a program/routine? (If for some reason, I read data into
memory then run a routine which will process those data, but the
routine has some error, THEN all my variables become "undefinend"). It
is annoying since sometimes the data came from a call done much
earlier in the IDL session.
How can I restore the variables to their data rather than running
again the routine/command which read them?
Thanks for any answer,
A.
