View-Nets- Select the Plane Nets in dialogue box-check All Except Connected Plane Nets
you may have to move the Plane Nets to View List first if they are not there
I had that done already but verified it again and it has made no difference. I have made the line disappear by actually routing a connection on the plane layer between the 2 pins. It gets flooded over and looks as if it's done properly. It's a workaround but I'm still curious as to what may be causing the issue to show up in the first place.
are you sure it's a split mixed plane?
the way you are describing, it sounds like poured copper
I guess that was confusing, check to make sure the copper is indeed split mixed and the proper net designated
this sort of thing happens when juggling layers around and layer definitions
It's definitely split/mixed, the net is correctly assigned also, there are multiple other pins on this plane and they seem to have no issue, but one of these two seems to have some problem. I also tried exporting to ascii and importing but that didn't clear it up either. (I sometimes do this when something spurious turns up and it often tends to clear it up)
1) Run Connectivity Check to see if there are any errors.
2) There may be a small unconnected ratsnet somewhere on the plane net.
This is not found by the connectivity check if the pad and trace are overlapping.
Switch off all colours except "Connection".
See if there are a small unrouted connection somewhere belonging to the plane net.