Hello, I am trying to use quartus 18.1 version for programming Arria10 device and getting the following error: Error (209066): The instruction register length for the 10AX115S2F45 device at position 1 in the JTAG chain is unknown.

[GNair2]

Board type : Dev Board .

Adding a scrrenshot of the error msg for referrence

[Abe]

Can you install the standalone Quartus Programmer nd then try. Also check the Jtag cable connectivity.

[ShafiqY_Intel]

Yes I'm agree with Abe. You can try to check the JTAG cable connectivity.

[GNair2 · Accepted solution]

Hi Abe and MShafiq,

We updated the Drivers and now the issue has been resolved.

Thanks for the help .