A zero length wire may defeat your attempts to place a probe,
I think is the point. Why don't you stretch one of the resistors
way, a bit, and see if you can grab the node to put a probe on
it. Or whatever you call it, in PSpice.
Hi Ehsantech, What is this symbol used for labeling "Middle".
I think you can just put a label "Middle". Draw a hanging net on R4, put the label. Similarly use just the label on first ckt (delete the symbol).
Also move R3 to a right, so that a net is visible. Simulate again.
This should resolve.