Free form nested data structures

Trying to define a nested data structure in free form definitions, and the
compiler is complaining. Do you know what I'm doing wrong? I've inserted
the error messages where they're reported by the compiler

dcl-ds T2_t qualified template;
RNF3556: END-DS statement missing for a group containing free-form
statements
dcl-ds Fam qualified;
Col like(CurCol) INZ;
Wid uns(5) inz(10);
Hdg1 like(ColHdr_t) inz('Product');
Hdg2 like(ColHdr_t) inz('Family');
end-ds;

dcl-ds Fac qualified;
Col like(CurCol) INZ;
Wid uns(5) inz(10);
Hdg1 like(ColHdr_t) inz('Dekko');
Hdg2 like(ColHdr_t) inz('Facility');
end-ds;
end-ds T2_t;

RNF3551: END-XX is not expected.