Hi,

Since you have to select the embedded pages from the original page list based on a when rule, you don't have a choice but to check each embedded page over the when rule. What can be avoided here is to not have an activity step where you loop on the original pagelist and use the when rule in the precondition of the child step and then copy the embedded page into the new pagelist which matches with the when rule,. Instead you can use a custom version of the IsInPageListWhen function.

Use the below code:

boolean retValue = false;
PublicAPI tools=ThreadContainer.get().getPublicAPI(); 
Iterator it = lookIn.iterator();
while (it.hasNext()) {
    ClipboardProperty next = (ClipboardProperty) it.next();
    ClipboardPage nextPage = next.getPageValue();
    if(pega_rules_utilities.callWhen(tools,whenName,nextPage) == true) {
        appendTo.add(next);
          retValue = true;
    }
}
return retValue;

Here, lookIn will be the original pagelist i.e Orig.pxResults

appendTo would be New.pxResults

whenName would be the name of the when rule that is in the same class as that of the class of the embedded pages in Orig page. i.e Orig.pxResults's pxObjClass value.

Also added the screenshots of the processing.