Question

Is is possible to specify user defined command on error in tcl script?
I want to cleanup the memory on if any error comes. I know that last error is saved in errorInfo variable.

Answer 1

You can also define a bgerror procedure and call your code as a background task:

proc bgerror { msg } {
  puts "bgerror:$msg"
  # Cleanup code here
}

proc troubleCode { } { 
  adjsad s ahda 
}

after 1 troubleCode