Libre Office Calc update misbehavior

[Geoffrey Combes]

Acting on Paul Whipp's suggestion I have used cell names instead of 
direct cell references for the content of  cells referred from one page 
to another within a Calc file. This should prevent the loss of page 
reference when Libre Office is updated. Cross referencing between 
different Calc files must use direct cell references it would seem. By 
direct I mean A1 for example. This closes this issue.
Geoffrey Combes