Works fine for me:
data have(label='Class data');
set sashelp.class;
run;
filename xpt temp;
%loc2xpt(libref=work,memlist=have,filespec=xpt,format=v8);
proc delete data=have; run;
%xpt2loc(libref=work,memlist=have,filespec=xpt);
proc contents data=work.have;
run;
Result:
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