The X declaration was previously given with a byte-ordering
of 'Y', but the current declaration has a value of 'Z'.
where X is binary-input or binary-output.
or The X declaration was implicitly set to a byte-ordering of Y when
the first rule was encountered, but the current declaration has a
value of Z.
Compilation continues but no compiled source code file will be saved.
binary-input and binary-output declarations can
be given several times in an OmniMark program, as
long as each kind of declaration always has the same value.