From: klee@unibwm.de   
      
   On 11.11.2019 17:31, Anton Shepelev wrote:   
      
   > The line   
   >   
   >     type a > C:\NOSUCHNDIR\est.txt   
   >   
   > contains two actions: an invocation  of  `type'  and   
   > the  redirection of its output to a file.  If `type'   
      
   'type' simple writes to stdout and never sees the redirection   
   part of the command. The redirection is done by CMD when   
   it parses the line. If the redirection can't be done   
   because of a non existing directory, then 'type' is   
   never invoked and therefore can't change the errorlevel.   
      
   > resets ERRORLEVEL on success, why does the  previous   
   > value of ERRORLEVEL matter?  If a failed redirection   
      
   If 'type' isn't executed because of the impossible redirection,   
   then type can't modify the errorlevel and it therefore has   
   the same vale as before the 'type' command. So set   
   the errorlevel to 1 before the 'type' command. If 'type'   
   is executed and successful, then errorlevel is reset to 0   
   by 'type'. If 'type' isn't invoked (because of the redirection   
   error) or is invoked but not successfull (maybe disk full),   
   then the errorlevel is not 0.   
      
   > sets ERRORLEVEL, why does the result of `type'  mat-   
   > ter?   Perhaps I misunderstand the sequence in which   
   > the shell executes that line...   
   >   
      
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