Making fields in a repeating table required

The following workaround can be used to enforce that a field within a repeating table be required for the user to complete, even if the table is not required.

1. Add a hidden field inside the table field {{tally}} with the following Dynamic Value, with {{field}} being the data name of the field inside the table:
   
   IF({{field}}!='',1,0)
   
   This will enumerate a value of 1 if there is a value present but keep it at 0 if nothing has been entered.
   
   
2. Add another hidden field outside the table {{count}} with the following in the dynamic value:
   
   SUM({{tally}})
   
   This will sum up the value of the {{tally}} fields inside the table.
   
   
3. Add a text field or another field beneath the hidden field above with something like this in the Default Value property, ensuring that the Required and Read Only checkboxes are ticked:
   
   Please enter (such and such) above
   
   You might also include a Visibility rule to show the field only if {{field}} has not been filled out:
   
   {{field}}!=''
   
   Then add following in the Custom Validation property:
   
   {{count}}>0
   
   Also add something like this in the Validation Message property:
   
   Please enter (such and such) above
   
   This will force the user to stop and add a value to the table field if no rows have been added -- i.e., if the value of {{count}} is less than 1.