Maximum workflow and activity types

Hello,

We have hit the limit "Maximum workflow and activity types" Although we can still register activities in other domains, switching domains is too complicated in out case because the domain name is used in many places outside SWF :-)

We use Java framework and use same version across all WFs and activities. So whenever we change activities, we bump up the version number that leads to hundreds of new activities to be registered.

While we are waiting on the limit increase, what would be the recommended practice to minimize the number of activities registered?

Thank you