In this example, the user5628 (which is actually sick) has a checked out file in its dynamic view. How can I cancel this checkout?
$ ct lsco -all | ag foo
2013-08-29 user52001 checkout version "L:\a\path\foo.c" from \main\branch_a\0 (reserved)
2014-04-10 user5030 checkout version "L:\a\path\foo.c" from \main\branch_b\0 (reserved)
--11-18T08:29 user52212 checkout version "L:\a\path\foo.c" from \main\branch_c\1 (reserved)
--04-15T14:24 user5628 checkout version "L:\a\path\foo.c" from \main\branch_d\11 (reserved)
--04-30T08:05 user5072 checkout version "L:\a\path\foo.c" from \main\branch_d\11 (unreserved)