Hi; Sorry for the confusion. Yes I was using the remove and removeif functions. it was trivial on Table B but for Table A it never worked.
I did manage a work around, that was to copy the table A and update the app to reflect the new table name (Table C). Really strange. Only thing I can figure is with my Office E1 subsrciption maybe once 15 days passes it locks out the table remove... But I could add?
The only other change I made (before I copied) was to uncheck the "searchable" option on a number of fields.
As for the formulas I tried (and are now working with new table ) they are:
1) - Blow all data away - RemoveIF('TableB',true); RemoveIf('TableC',true)
2) - Remove a single row - Remove('TableB',ThisItem) - this one is called from within a cutom text Gallery
3) - Remove the parent and all child entities - RemoveIF('TableB', ID=Value(ThisItem.PrimaryID)); Remove('TableC', ThisItem)