Adam, Some more detail: The past 3 days I have done wetland location, mostly in bare leaves deciduous areas. In the past under similar conditions the T2/LS would pick the shots up fairly well. Usually I would start the location in float, by the time I typed in the flag number and hung a witness flag it generally was fixed and off to the next point. Each of the 3 days, one at a site 30 miles away, I would start out with in good shape, working away from the base as usual. 10-20 minutes in the "No-Time Tag" message would pop up and not resolve on it's on. At this point the Latency would be 14.2 sec and then go to 600 sec, etc. At first restarting the RTN might resolve it to get a shot or two, but then it bounces to no time tag. This has not been my previous experience. After a half hour of this I switch to the RTN, which is typically significantly slower in getting results. Sometimes after all this I will walk back toward the base, change setups and reconnect. Walk into the woods and get another shot or two and repeat the cycle. MIFI's are definitely not overheating in this weather. They are both static. I tried clearing the T2 NVRAM. I am not familiar with deleting files from the T2. Is it possible to do it from the LS under Base/Rover setup? Any troubleshooting is welcome.