  Let $E(0,1)$ be a symmetric space on $(0,1)$ and $C_F$ be a symmetric ideal
of compact operators on the Hilbert space $\ell_2$ associated with a symmetric
sequence space $F$. We give several criteria for $E(0,1)$ and $ F$ so that
$E(0,1)$ does not embed into the ideal $C_F$, extending the result for the case
when $E(0,1)=L_p(0,1)$ and $F=\ell_p $, $1\le p<\infty$, due to Arazy and
Lindenstrauss.
