replication task stuck

Hello,

I tried to stop a replication session via GUI , however, when I look in the nas_task it is stuck at 75 % complete and doesn't move from there . Could someone please suggest what needs to be done ?

[nasadmin@cs1 ~]$ nas_task -i 970815

Task Id                = 970815

Celerra Network Server = west40046cs1

Task State             = Running

Current Activity       = Info 26045317742: The destination object (file system, iSCSI LUN, or VDM) is being synchronized with data from the latest checkpoint.

Movers                 = server_2

Percent Complete       = 75

Description            = Stop Replication VM40847_nfs01 [ id=327_C#####0_2007_2720_CKM####_2007] .

Originator             = 10.21.52.10

Start Time             = Wed Mar 30 21:44:09 CEST 2016

Estimated End Time     = Thu Mar 31 00:17:20 CEST 2016

Schedule               = n/a