Hello,
My program often runs "exec ..." and gets data back from that command, but
sometimes the data or computer(PC) is not available, so I wouldn't get any
data back and would see an error message box popup such as "...variable does
not exist or something likes that" because the command go outs to get data
from this (PC) and the (PC) is down. If I run "exec ... &", I wouldn't see
any error message box popup but the program just not return any data. In my
program I like to setup an error catch, so if I see that command couldn't
run and I will either display my own error message or skip to something else
rather than have TCL/TK popup their own error message box. Please tell me
how I can do that? Thanks.
Ryan
