Hi,
You have used getSelectedValue() function for dropdown2. Usually the data will be triggered by key values not by text value.
var vtype = DROPDOWN_2.getSelectedValue();
Instead of assigning "All types" to variable, just pass blank value like below one
if (vtype == " ")
{
DS_1.setVariableValueExt("VAR1", "V1;V2;V3");
}
else
{
DROPDOWN_2.setSelectedValue(vtype);
DS_1.setVariableValueExt("VAR1",vtype);
}
Thanks