I have been working on a four layer board with Gnd plan on top and bottom.Once I pour the Gnd I put stitching vias
I had to work on the ground and delete one of the tracks on the ground and I have notice that the some stitching vias has disappeared
That has been recurring often.
I have tried few times to repeat this and have noticed that if I connect the vias with tracks to another via while the Gnd was already poured it’s keeps everything including vias in place .
But if I connect the via with a track to the other via while ground is not poured frist it will delete vias in some areas of the board. If you where working on close zoom you would not see that the via’s disappeared .
I have reported this to support.
Farther more when you verfiy your design /conectivity and it comes up with no error - why i can still see some of the rates net on the GND?
What software&version? When using Layout v2005 the vias would disapper so often I got into the habit of always GLUING the stitching/free vias. That seemed to keep them from going away. Don't recall any problems with layout V9.1