Keil Debugging Issue – STR736FV2T6 + ULINK2 “No Algorithm Found” During Debug Start

Hi everyone,

I’m running into a problem while trying to debug my hardware using ULINK2 in Keil MDK v5.42. I'm working with the STMicroelectronics STR736FV2T6 (ARM7TDMI core), and every time I start the debugger, I get the following error:

No Algorithm found for: 00000000H - 0000D663H
No Algorithm found for: 00010000H - 0001FFFFH
No Algorithm found for: 00020000H - 0002B433H
No Algorithm found for: A0000000H - A00021DFH

My current memory setup:

• IROM1: 0x80000000, size: 0x20000 (128 KB)

• IRAM1: 0xA0000000, size: 0x4000 (16 KB)

Flash Algorithm:

• I selected STR73x Flash 256K (range: 0x80000000 – 0x803FFFF) in the Flash Download settings.

What I’m trying to do:

I am not flashing the device — I’m trying to start a debug session to step through the firmware. However, Keil still throws the above “No Algorithm found” errors related to 0x00000000, even though my code is mapped to 0x80000000.

System Info:

• Keil MDK Version: 5.42

• License Type: Activation Code

• Compiler: ARM Compiler 5.06 update 6 (build 750)

• Target MCU: STR736FV2T6 (ARM7TDMI)

• Debug Adapter: ULINK2

• OS: Windows 11

How do I fix this error and get debugging to work properly?

Any help would be much appreciated! Thanks in advance.