You can speed up watching what happens in a single day in the stepped log by looking at another system, preferably one with nothing you can see moving in it on that day. This lets you see a before-and-after of any system by checking the system first, switching to another system, stepping the log, and going back to the first system. You can even do the switch while the day is playing, and it'll finish processing just as soon as the current ship's animation finishes.
Hmmm what are the 143 ways that I am unable to view movement logs? I load all players shipsets, no dice. Latest patches etc, still nothing but errors..
I ask the same questions but in terms of combat replays, all errors, all the time.
Be sure you have run the previous turn on the same machine. You will get an error trying to watch logs if the latest log file is not in the same folder as the previous log. Basically when you end a turn it records what happened and then needs to have the new turn logs available to compare them, otherwise you get a message along the lines of "current turn is not valid".