I was fiddling with the debugger and trying to get memory tracking working.

I type

trackmem
or
trackmem 1,0,1

which should activate memory tracking, and after a memory write to $00 doing

pcatmemp 00

gives me UNKNOWN PC.

The same UNKNOWN PC with a right click on the memory view window.

I've had it working in the past so I'm a bit confused.

I'm running mame205 with the apple2p driver.