system("cd /$view_tag/lib_engine/hwt  ; cleartool lsco -cview -r -s  > /$view_tag/lib_engine/hwt/co_file");
system("cd /$view_tag/app_hwt/$md_dir ; cleartool lsco -cview -r -s  >> /$view_tag/lib_engine/hwt/co_file");