From: address@not.available   
      
   JJ,   
      
   > However, it seems that there's a bug on the second command   
   > line processing, since it may cancel the CALL command execution.   
   ...   
   > rem but since `%b%` is not quoted, after expansion,   
   > rem the `&` should be treated as a command reparator.   
      
   which is why I expected /something/ to be displayed, even just that the word   
   after the "&" could not be found as a command.   
      
   Thanks for the confirmation of the problem/bug.   
      
   > Chances are that, your SET /P is like this.   
   >   
   > set /p a="%1" So the quotes from the content of `%1` should be stripped first. i.e.   
   >   
   > set /p a="%~1"