Delay function in scs

i saw the resource explorer,

the delay function is

Examples

Microsecond Delay

// Power up the sensor and wait 850 microseconds for it to get ready

gpioSetOutput(AUXIO_O_SENSOR_POWER);

fwDelayUs(850, FW_DELAY_RANGE_1_MS);

// Sample the sensor and store the ADC value

adcGenManualTrigger();

adcReadFifo(output.adcValue); 

Instruction Cycle Delay

// Generate a 2 microsecond pulse (gpioSetOutput() and gpioClearOutput() take one instruction cycle each)

gpioSetOutput(AUXIO_O_SENSOR_POWER);

fwDelayInstrCycles(23);

gpioClearOutput(AUXIO_O_SENSOR_POWER); 


but once i add the sentence in scs:

fwDelayUs(850, FW_DELAY_RANGE_1_MS);

it comes out that there is syntax error:
can anyone help>?

thanks

Jeff