I get download failed on my ASI071MC Pro.
I have tried updated drivers, ascom, windows net...
I have swapped out cables and swapped out which port the USB connector is placed into on my computer both USB2.0 and USB3.0
Sharpcap and Nina both give similar message.
For a couple clear nights last week I was able to get a connection working and then the next day it would fail again.
On 3/4 and 3/5 both nights it is a hard fail and nothing I do will allow it to work.
Also tried deleting the devices with device manager on win10 and just continues to fail.

I downloaded the firmware update tool but that appears to only be for EFW.
This setup has remained outside with telegizmo covers for the last 2 months.

On Nina I tried both the NINA internal driver and also the latest ZWO ASI CAMERA driver.

Here is one of the recent logs.
18:21:22.319 ASI Camera (1) : IsConneted : False, Set : True
18:21:22.406 ASI Camera (1) : open camera ID0
18:21:22.410 ASI Camera (1) : open camera ID0 success
18:21:22.780 ASI Camera (1) : NumX4944 NumY3284
18:21:22.843 ASI Camera (1) : USB3.0
18:21:31.685 ASI Camera (1) : width 4944, height 3284
18:21:31.685 ASI Camera (1) : not FPGA bin
18:21:31.685 ASI Camera (1) : Start Exp:5 start (0 0) WH (4944 3284)
18:21:52.668 ASI Camera (1) : snap image failed, Retry #1!
18:21:52.668 ASI Camera (1) : width 4944, height 3284
18:21:52.668 ASI Camera (1) : not FPGA bin
18:21:52.668 ASI Camera (1) : Start Exp:5 start (0 0) WH (4944 3284)
18:22:12.667 ASI Camera (1) : snap image failed, Retry #2!
18:22:12.667 ASI Camera (1) : width 4944, height 3284
18:22:12.667 ASI Camera (1) : not FPGA bin
18:22:12.667 ASI Camera (1) : Start Exp:5 start (0 0) WH (4944 3284)
18:22:32.670 ASI Camera (1) : snap image failed, Retry #3!
18:22:32.670 ASI Camera (1) : width 4944, height 3284
18:22:32.670 ASI Camera (1) : not FPGA bin
18:22:32.670 ASI Camera (1) : Start Exp:5 start (0 0) WH (4944 3284)
18:22:34.217 ASI Camera (1) : IsConneted : True, Set : False
18:22:36.265 ASI Camera (1) : stop exposure
18:22:36.843 ASI Camera (1) : connect->close
18:22:36.858 ASI Camera (1) : disconnect free buffer
18:23:40.023 ASI Camera (1) : IsConneted : False, Set : True
18:23:40.041 ASI Camera (1) : open camera ID0
18:23:40.046 ASI Camera (1) : open camera ID0 success
18:23:40.413 ASI Camera (1) : NumX4944 NumY3284
18:23:40.479 ASI Camera (1) : USB3.0
18:27:29.402 ASI Camera (1) : IsConneted : True, Set : False
18:27:29.402 ASI Camera (1) : connect->close
18:27:31.768 ASI Camera (1) : IsConneted : False, Set : True
18:27:31.788 ASI Camera (1) : open camera ID0
18:27:31.792 ASI Camera (1) : open camera ID0 success
18:27:32.166 ASI Camera (1) : NumX4944 NumY3284
18:27:32.232 ASI Camera (1) : USB3.0
18:27:48.422 ASI Camera (1) : width 4944, height 3284
18:27:48.422 ASI Camera (1) : not FPGA bin
18:27:48.422 ASI Camera (1) : Start Exp:5 start (0 0) WH (4944 3284)
18:28:12.104 ASI Camera (1) : snap image failed, Retry #1!
18:28:12.104 ASI Camera (1) : width 4944, height 3284
18:28:12.104 ASI Camera (1) : not FPGA bin
18:28:12.104 ASI Camera (1) : Start Exp:5 start (0 0) WH (4944 3284)
18:28:32.115 ASI Camera (1) : snap image failed, Retry #2!
18:28:32.115 ASI Camera (1) : width 4944, height 3284
18:28:32.115 ASI Camera (1) : not FPGA bin
18:28:32.115 ASI Camera (1) : Start Exp:5 start (0 0) WH (4944 3284)
18:28:51.614 ASI Camera (1) : snap image failed, Retry #3!
18:28:51.614 ASI Camera (1) : width 4944, height 3284
18:28:51.614 ASI Camera (1) : not FPGA bin
18:28:51.614 ASI Camera (1) : Start Exp:5 start (0 0) WH (4944 3284)
18:28:52.942 ASI Camera (1) : stop exposure
18:29:06.035 ASI Camera (1) : IsConneted : True, Set : False
18:29:06.035 ASI Camera (1) : connect->close
18:29:06.066 ASI Camera (1) : disconnect free buffer