Isolating Irregular Element

Hello

I have created a Dynamo workspace that copies the value of a certain shared parameter (Type Mark) into another parameter (ZME).

while doing that i noticed that there are some elements that i have forgotten to give value to their type mark (from the watch node, row 15), so my question is this, what nodes should i add to filter those elements so i can assign value to them.

Sorry if the question is on beginner level, im new to dynamo.

thanks in advance

Hello @NERDASORUS , you can filter your empty elements like this…