That command didn't work either. It consistently reports "Invalid input detected at '^' marker."
With the marker pointed at the letter p in "aprm".
I thought that the version I have 12.3(8)JA2 is more recent than 12.3(2)JA, but admit confusion when it comes to the version numbering system. Is there a definitive release history for the 12.3 branch somewhere on this site?