r corak - 2012-03-26

Using THE 3.3RC1 and Regina REXX-Regina_3.6(MT) 5.00 31 Dec 2011.  run_os seems broken.  This command writes the output of DIR to a new window then hangs THE: 
REXX IN.0=0;OUT.0=0;ERR.0=0;R=RUN_OS('DIR C:\USERS /AD','IN.','OUT.','ERR.')