Riverdi_101 STM32H7: ST-Link can't connect to board

[richi]

For more than 3 days I am trying to solve a problem of connecting to Riverdi board using external ST-link from a discovery board. I flashed apps without problem and now I can't do anything. I remember last time I was flashing an app it asked that firmware of St-link has to be updated before continuing so I proceeded. I successfully flashed the app but now I am unable to flash it again. 
 

13:07:23 : STM32CubeProgrammer API v2.18.0 | Windows-64Bits
13:07:27 : UR connection mode is defined with the HWrst reset mode
13:07:27 : ST-LINK SN : 0670FF3332584B3043153854
13:07:27 : ST-LINK FW : V2J45M31
13:07:27 : Board : STM32F4DISCOVERY
13:07:27 : Voltage : 2.91V
13:07:27 : Error: Unable to get core ID
13:07:27 : Error: No STM32 target found! If your product embeds Debug Authentication, please perform a discovery using Debug Authentication

If I try to connect to other boards It is connected without problem.
Please help,

Regards

 

[mƎALLEm]

Hello,

Which board? in the title you said: "STM32H7 cant connect to board"

but the log said: Board : STM32F4DISCOVERY

Could you please clarify? do you have a F4 discovery board connected via USB to your PC?

[richi]

That is the weird thing , this is the ST-link from F4 discovery board, I removed the jumpers to use only ST-link. I performed connect under Reset and performed full chip erase. However, flashing is still not possible. 

[mƎALLEm]

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@richi wrote:

That is the weird thing , this is the ST-link from F4 discovery board,

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Not clear. Are you using a STLINK module from F4 discovery to connect to that Riverdi board? If yes that was an important information you should provided in the first post.