I couldn't get the script provided by Atanas to work for me.
here's a variation...create a file with the project names with a line break after each project....
i.e. 'cat p.list' would show:
poject1
poject2
poject3
poject4
then, run:
for i in `cat p.lst`; do echo --$i-- && rd executions list -p $i; done