Dirac Measurement Error

[rabinms]

Have run Dirac with the EMM-1 successfully, but after reading several comments in this forum wanted to try the Umik-1. Got one of those from Cross Spectrum, got the levels set and started taking measurements. I got an error on all channels for measurement 2, but re-ran it and everything worked just fine up until measurement 6. Now I'm getting the same error on all channels again each time I run it (REC2IMP_IMP_START_IDX_IS_NEGATIVE). Running Windows 7, have firewall disabled, etc. The message seems to be telling me that the start index is negative, but I don't know what that means or what to do about it. Running hard wired ethernet connection to the XMC-1 and WiFi on the PC. Usually decent connection and worked on measurements 1-5, but is stuck on number 6.

Anybody have any ideas as to the cause/solution? Latency issues from WiFi connection on PC? Some sort of resource contention on the PC (could see this intermittently, but have run it several times now over a couple of hours or so)? PC/Dirac/XMC-1 just deciding that it's done enough work for a Sunday and is taking the rest of the day off?

Thanks for your thoughts.

[geebo]

Can't think of anything. I use the UMIK and it works fine. What kind of SPL are you getting from the test tones at the sweet spot?
You might also try shutting down the XMC, then switch it off at the rear for a minute and try again.

[rabinms]

FINALLY got the measurements to complete yesterday after letting things sit for extended periods of time and multiple retries. Sometimes I would get the error on only some of the channels, other times all channels and then, for apparently no reason, everything worked fine.

Geebo, levels were almost right on -12 for all channels. Right surround is the quietest of the bunch, so used the alternate method outlined in the manual to set the overall level to it and reduce the levels of the others to bring them in line. Didn't think of power cycling the XMC-1, but will keep that in mind should I run into the problem again. Would still like to know what the error message indicates the problem to be and how to avoid/correct it, but may just have to call in at some point to find that out.

MUCH more pleased with the results of this effort than my initial one. Will use these measurements as a base to start experimenting with tweaking the target curve, but that'll be for another day.