CORBA 2.6.1 Programmer's Guide for Java

At most, one of -i, -w, -r should be specified. If none are specified, "-i" is assumed. At most, one of -t and -d should be specified.
When neither is specified all orphaned contexts older than 30 days are candidates for deletion. When -r is specified, the -t and -d options
have no effect.
Chapter 4. Deploying a NonStop CORBA
Application
Chapter 6. Writing Scalable Applications