Are you using one of the LabVIEW examples for I2C scripting? Have you tried one of those? How are you configuring the I2C communication parameters? (clk speed, Volt levels and such) Finally, can you confirm the error code is -30742 and not -301742. If the latter is the case, then the problem is caused by the slave not acknowledging the master’s signal. Please reply back so that we can continue the troubleshooting process. Have a nice day.
Luis J. Applications Engineer National Instruments