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LAUNCHXL-CC1350: CC1350 Launchpad: Error Connecting to Target

Part Number: LAUNCHXL-CC1350

I'm using a Texas Instruments CC1350F128 board.

I was trying to flash the latest firmware onto a custom board and ran into the following issue, after clicking load image,

[2/12/2024, 9:41:29 PM] [ERROR] IcePick_C: Error connecting to the target: (Error -2131 @ 0x0) Unable to access device register. Reset the device, and retry the operation. If error persists, confirm configuration, power-cycle the board, and/or try more reliable JTAG settings (e.g. lower TCLK). (Emulation package 12.6.0.00029).

Note: I think I may need to power the custom board up, with the required batteries, but I didn't want to do this until receiving some feedback on the above. Currently, the custom board doesn't have power.