Drive GUI stacked due to a wrong shutdown procedure (Jul. 27th 01-02UTC). This was simply a human error.

First, we pushed ParkIn button as usual in the end of the night. We confirmed the telescope was in Locking Position in GUI, but most probably overlooked to check the statuses of access tower and CSS.

Next, we went to the drive container, turn the key into Service mode and pull it out. (Before get into the drive container, we saw the telescope in parking position, but apparently this inspection was not enough.)

Then, we visually found the camera shutter/SIS was not closed/put back (this was also our misoperation). BUT, at this time, we couldn't notice that access tower was open. (Since it was complete dark time, it was not clear to see even using a fully charged flash light.)

After closing/putting back the camera shutter/SIS (visually checked), we inserted the elevation bolt and locked the azimuth properly. Then, inserted the key back and went back to CC.

Finally, we found that the status of access tower/CSS was opened/unlocked. At first we though this was a bug of the GUI, so closed and opened the GUI, but (of course) it didn't change.

Then, we tried to push the parkin button after turning the key into Automatic mode, but the GUI didn't response. So, we contacted to the drive expert at this point (01:35UTC).

Ino asked us to visullay check the access tower and CSS (01:52UTC). After turning the key into Service mode, we confirmed that the CSS seemed to be locked but the tower was indeed open (02:00UTC). We turned the key into Automatic mode and got out the telescope area. Ino successfully locked and closed remotely (02:21UTC). We turned the key into Service mode and closed the shop.