$title $load under $onMulti works like data statements (LOAD1,SEQ=21)

set i / i1*i3 /
parameter a(i) / i1 1, i2 2, i3 3 /
parameter b(i) / i1 1, i2 2, i3 3 /
          c(i) / i1 5 /

$gdxOut gdx1
$unLoad c
$gdxOut

$onMulti
parameter a(i) / i1 5 /;
display a;

$gdxIn gdx1
$load b=c
display b;

abort$sum(i, a(i) <> b(i)) 'a should be equal to be',a,b;