When you download a program to the ViX intelligent drives, the first 2 lines of code MUST be the following:
nK ---- kill or stop any program currently running
nCLEAR(ALL)---- Erase all existing programs
The n indicates the device's address.
Please keep in mind that if you upload the code and make modifications, you MUST insert these lines at the top of your code before downloading. Failing to do so will result in an error during the download.