OTL Redwood Timecard Validation

I have an SR with Oracle but wondered if anyone has configured the Redwood Timecard to produce an error when people enter a timecard with quantities or times missing for a row.

For example, in the timecard grid below we don’t want the user to be able to submit the timecard because they have entered flexi on row two with no values. We want an error to be produced saying system – “You need to enter either the start and stop times, or a quantity”. 

Redwood will save the timecard with no entries entered for the row, but when the timecard is submitted the row is delete. We want the message so the user checks they have not missed anything.