Expect script not working and send status getting skipped - expect

Question

I have written a script to execute a setup on the server, but while executing send statement is getting skipped and other one getting executed.
Below is my script :
enter code here[code written][1]
====================ERROR m getting=============================
Enter the name of the new namespace you want to create [coe_ns] :
Enter the name of the clearinghouse you want to create [coe_ch] : invalid command name "C"
while executing
"C"
invoked from within
"expect -re "* Option to execute (Continue/Restart/Quit) [C]: $""
(file "./TNS_Server_Setup.sh" line 21)
I have a doubt that send command before that is not getting executed, also am I passing "ENTER" right way.

Answer 1

expect uses square brackets as the command substitution syntax (in the same way that the shell uses backticks or $(...). So when you write
expect -re "* Option to execute (Continue/Restart/Quit) [C]: $"
expect sees [C] and tries to invoke the command C.
Also, that standalone * will throw a "quantifier operand invalid" error, because that's a special character for regular expressions. You either need to escape it or remove it from the expression.
Use a different quoting mechanism that inhibits command substitution (like in the shell where you'd use single quotes)
expect -re {Option to execute (Continue/Restart/Quit) [C]: $}
You did not include your code in the question so we can't see your send command, but to "just hit enter", you would send "\r"
Update:
If you need to match multiple things, the expect command can do that: give it a list of pattern action pairs. Expect will match any of them.
expect {
-re {Option to execute (Continue/Restart/Quit) [C]: $} {
send "\r"
exp_continue
}
-re {enter the datatype $} {
send "array\r"
exp_continue
}
"some pattern that denotes we're done"
}