ROC - Detail of Initial Subscriber error "Distinctive No From Can Not be blank or zero"

Roc - Detail of Initial Subscriber error "Distinctive No From Can Not be blank or zero"

Possible Resolution
In the Initial Subscriber entry, Distinctive No is come automictically according to the sequence of "No of share taken", the user can not enter "Distinctive No" manually. The user has to click "New" button to make a new entry.
The error that is coming in the given picture is coming because here the user has used the option of 'Edit' instead of 'New' to enter new detail of the 'Initial Subscriber'
Go to Transactions > Share and securities > Initial Subscriber

Note: -In the 'initial subscriber' entry, Do not use the Edit button for the new entry