The automatic conversion of the function ADRESS from old syntax to new syntax
does not recognize, if conversion has already been done and stored.

Try this:

(1) New spreadsheet document
(2) Enter =ADDRESS(1;1;1;1;"Sheet1") in any cell
(3) This results in: Sheet1.$A$1
(4) Save document as SXC
(5) Close and reopen document
(6) Formula has been changed to: =ADDRESS(1;1;1;1;1;"Sheet1")
(7) This results in: Err:504

The problem is caused by the automatic conversion of the function ADRESS from
old syntax to new syntax.

Old syntax: ADDRESS(Row; Column; Abs; "Sheet")
New syntax: ADDRESS(Row; Column; Abs; A1; "Sheet")

Parameter A1 has been added to the new syntax for interoperation with
competitor´s spreadsheet and for introduction of R1C1-references, that is coming up.

When opening documents, Calc must recognize old syntax an convert it to new
syntax by adding the additional parameter. However, when the formula already has
been stored with new syntax, no additional parameter must be added.

Works fine as long as you stick to ODF. But when opening SXC, Calc would add an
additional parameter to the function, every time you open the document. By
opening, saving and reopening an SXC document 10 times you will get:

=ADDRESS(1;1;1;1;1;1;1;1;1;1;1;1;1;1;"Sheet1")

This brakes the possibility to use SXC file format with OOo 3.0. Was no problem
with 2.4.1 --> regression.