This is created bt PADS Layout by itself. Something goes wrong, and arcs are messed up.
When this happes, only way to restore is to create a new pcb project.
It should look like this
One of the older version of PADS had bug.
What version are you using?
VX2.3 update 1
Looks like bug got reintroduced. I haven't updated to VX2.3 yet.
Ascii it out and bring it in VX2.1 or VX2.2 if you still have them.
Seems that this was caused by two overlapping keepouts assigned to <all layers>
One with the squircle shape, another with those small cutouts on top and left side. Both having different keepout-rules.
After removing the squircle, and adding small areas to those cutouts, this seems to work.
Didn't try export/import.
Retrieving data ...