programming 1.8V controller

[embitz]

Well, that's easy to solve.
Just overrule the VCC in the interface settings by 1.8

   

Background:

If you look into the flash/f7_f4_f2.script file you can see where it did go wrong and how that VCC_VOLTAGE is overruling the detected voltage

Code:

<snip...>

        // Check the voltage and set the right flash strategy
        if (isScriptObject("VCC_VOLTAGE") && VCC_VOLTAGE>0)
        {
            voltage = VCC_VOLTAGE
            printf("CLI vcc voltage: %f \n", voltage)
        }
        else
            voltage = intrfApi.targetVoltage()

        if(voltage  < 1.8)                         <-- without override this throws your error
        {
           _n_throw(ERROR_VOLTAGE)
        }

<..snip>