...You may want to turn off the Leviton Repeater and see if anything changes.
Good thought! Unfortunately the logging behavior is the same with the phase coupler off.
One more thing I noticed: After the Activity Log locks up on remote commands (it continues logging direct ActiveHome commands and macros but NOT macros stored in the CM15A), if I quit the ActiveHome Pro software and then re-start it (just clearing the history isn't enough), the log starts working again. After logging a few commands, however, I get just one last command fragment logged and it locks up again. This last logged fragment does, in fact, represent the first half (e.g. "G4") of the issued command, the second half (e.g., "GON") being missing every time it locks up.
The fact that quitting and re-starting ActiveHome gets the logging started again temporarily (not to mention that all of the commands are actually getting executed whether logged or not) strongly suggests that I have a software problem, not a hardware problem, does it not?
But changing the software version (still running 3.10, as suggested by Dan at
http://forums.x10.com/index.php?topic=27918.msg156707#msg156707) hasn't helped. Are there any other programs I might be running that are known to interfere with ActiveHome Pro on a Windows XP SP3 system?
Regards. -- jclarkw