Axolot Data

Hi all,
I'm trying to compile the source code into a 64 bit package (component version 6.01.17) after creating a new package project and adding all source files to it but when I try to compile/build I get this error:
[dcc64 Error] XLSUtils5.pas(1752): Incompatible types: 'Integer' and 'Pointer'.
Can you help me?

XLSUtils5.pas lines with errors:

{ TIntegerStack }
function TIntegerStack.Peek: integer;
begin
Result := Items[Count - 1];
end;

function TIntegerStack.Pop: integer;
begin
Result := Items[Count - 1];
Delete(Count - 1);
end;

Thank you very much!
Luigi