chgrp
>newgrp project_name_old >cp project_name_old/debug.tcl .
>exit >newgrp current_project_name
>chgrp current_project_name debug.tcl # old script access permission for other users should be modify to current project >chmod 775 debug.tcl
Copy old project scripts debug.tcl to current project, let other users in current project to access to debug.tcl.