There are several points to continuity testing. First you verify that the wire from one receptacle is actually running to the next or not. Then, you verify that is where the problem is.
In order to test continuity: 1. Disconnect the 2 wires from each receptacle end of the cable run in question. 2. Test that no voltage exists between the 2 wires at each end. If you got both ends of a cable there should be no voltage in it, but you never know what's going on behind the wall. You may have guessed wrong about the two ends of a run. 3. Test whether each lead of the wire in question can complete a circuit between power source and a load such as a light bulb. You could use a 9 volt battery and a christmas light bulb (twinkle light size). Connect one wire from the battery to the light bulb. connect the other lead from the battery to one end of the disconnected cable in question (start with the white wire). Connect a lead from the other end of the cable in question (start with white wire) to the other end of the light bulb. Does the bulb light? Now test whether the black wire can carry electricity. Does the bulb light?
If it does not light for either lead of the wire in question, you may have guessed wrong about the two ends of a run. Also, may have a junction box behind the wall somewhere and one of the wirenuts may have broken.
You could also test the black leads from dead receptacles to white of known good for 115 volt signal. And from white to black. May help determine which lead is bad.
The other post about sensing juice assumes that you can get to the wires. However it does not help you isolate the problem.
Good luck and be careful. I'll be off of my computer till after new year & with y2k maybe forever.