pvm_lvgroup - Unenrolls the calling process from a named group.
pvm_lvgroup unenrolls the calling process from the group named group
The returned value will be >= 0 if the call is successful and will be will be < 0 if some error occurs.
If a process leaves a group by calling either pvm_lvgroup or pvm_exit, and later rejoins the same group, the process may be assigned a new instance number. Old instance numbers are reassigned to processes calling pvm_joingroup.
info = pvm_lvgroup( "worker" )