Not sure what you mean here set OBJID="1||2" set obj=##class(ChildClass).%OpenId(OBJID) ??
Yes, I'd expect that to work (haven't done it myself). But I am not sure if Mikko is indeed using CSP Bind or if he's got a reference to the parent object and he's opening it after posting the page. If so, you may not need to do the above, instead you'd identify the child within its parent's collection (using the sequential maybe?) Then again you can also use the above code in that case and from a performance point of view there's no difference.
not an expert with CSP Bind but if you want to open another page for an instance of the child class I guess you do something like
<a href="ChildPage.csp?OBJID=1||2">the child</a>
Yep, that should work as well (I guess!)
