Failed to execute MI command: target remote localhost:61234

[HMSEdinburge]

Hello , i have been getting this error very frequently across a few board  2x H7A3 and now i getting on H743 nucleo, sometimes i managed to resolve this by shorting boot0 pin and VCC pin then do a chip erase.  Most of the time cannot resolve this error! i am getting this error on CubeIDE 1.19.0 only. When i m using IDE1.9.0 it works perfectly and I've never seen this error. What is happening to 1.19.0 ? Why has it gone from bad to worst? Should i revert to using IDE1.9.0 ? Can ST people advise? 

[HMSEdinburge]

the H743 nucleo is working perfectly this morning!! dun understand why this *** pop up now !

[HMSEdinburge]

hello... anyone can help?

[Andrew Neil]

You just said it was working?

But your initial screenshot shows no target power:

[HMSEdinburge]

yes, it was working yesterday morning, and then it died forever. I could not resolve it, I had another H7A3 nucleo also dead forever and was unable to resolve it. ok what about the 0.01 v no target power?