Activity Groups and Grab Activities

An instance can be grabbed from any activity, regardless of whether the activity is grouped or not.

While grabbed, the instance will remain as grabbed in the grab activity, as in the following scenarios:

A Grab activity's task is executed over the instance, or
The instance is ungrabbed, or
The instance is sent to an activity different from the source activity, the source activity group's property will rule the operation (i.e., due transition expiration, exception handling, compensation handling).

The source activity's due time is removed when the instance is grabbed. On the other hand, the process instance deadline is kept active. Moreover, the due time for groups nesting the source activity are also kept active (in the event that the activity is within a group that is actually within another group).

When a grabbed instance is ungrabbed, from that moment on, the instance can be processed as usual in the source activity (activity from which it was grabbed).

Note: Once an instance has been grabbed, it can be sent to an activity different from the source activity but only within the same Activity Group.