Could not see execute button for the replication task in SAP HANA SDI

Hi I have created a replication task. It is a huge table and after running replication for 12 hours job is failing throwing the message execution aborted. There are only 230 million records in the source system.

To overcome this I have partitioned the table. Still it is failing.

Now I removed partition parameters and saved the job. Surprisingly now I cant see the execution button to start replication