Good evening everyone. I have recently run into a problem and was wondering if anyone could offer any advice. I currently use an LDG Z-100Plus Autotuner with my FT-891. I run a horizontal wire antenna in an NVIS configuration. I have never run into any problems with my Z-100Plus tuner not working. Randomly today, the tuner will no longer find a solution for an SWR tune. It sounds like the latches are working, yet the radio continues to report excessive SWR. The tuner completes the tuning process; however, it does not find a solution. Nothing has changed with my setup. I checked the following to try and discover what the problem was: I did check to make sure the coax feedline was connected and secure. I also checked the state of the coax feedline and did not locate any damage. The feedline was securely attached to the antenna transformer. I checked to make sure the feedline was securely attached to the wire antenna transformer unit. I checked to make sure the wire antenna and counterpoise were properly connected to the transformer unit. I checked the health of the battery powering the Z-100Plus tuner. I attempted a long button press on the tuner to initiate a full tune, not from memory. After checking all of the above, I still cannot get the tuner to find a solution. To continue working on my contacts for the night, I attached a 300 Ohm termination resistor to the end of the antenna wire, changing my configuration into a sloping wire configuration. I still get excessive SWR, which should not happen. When I put the tuner in bypass mode still get excessive SWR. When I plugged the antenna feed line directly into my FT-891, the SWR is back to an acceptable level. Any help would greatly be appreciated. Thank you!