c do j=ifrag_back(1,i,iset)+1,ifrag_back(2,i,iset)-1 ! Econstr_back legacy
c write(iout,*) "xxtab, yytab, zztab"
c write(iout,'(i5,3f8.2)') i,xxtab(i),yytab(i),zztab(i)
c do j=ifrag_back(1,i,iset)+1,ifrag_back(2,i,iset)-1 ! Econstr_back legacy
c write(iout,*) "xxtab, yytab, zztab"
c write(iout,'(i5,3f8.2)') i,xxtab(i),yytab(i),zztab(i)