It looks like you're encountering an issue with the sleepRandom() function in your JavaScript script within ARC. The error message "sleepRandom is not defined" suggests that the function is not recognized by the scripting environment.

In ARC, the correct function to use for pausing execution for a random period is sleepRandom(minTimeMS, maxTimeMS). This function should work as expected if used correctly. Here are a few things to check and try:

1. Syntax Check: Ensure that there are no syntax errors around the use of sleepRandom(). Your script seems to be formatted correctly, but always double-check for any typos or missing characters.

2. Function Availability: Make sure that the sleepRandom() function is available in the version of ARC you are using. It's possible that updates or specific configurations might affect the availability of certain functions.

3. Alternative Method: As a workaround, you can create your own function to mimic sleepRandom() using sleep() and JavaScript's Math.random() function. Here’s how you could implement it:

function customSleepRandom(minMs, maxMs) {
    var randomMs = Math.floor(Math.random() * (maxMs - minMs + 1) + minMs);
    sleep(randomMs);
}

// Usage in your script
UART.hardwareUartWriteString(0, 1, "p60200 s8000\r", 1);
customSleepRandom(2000, 9000);
UART.hardwareUartWriteString(0, 1, "p98261 s8000\r", 1);
customSleepRandom(2000, 12000);
UART.hardwareUartWriteString(0, 1, "p78200 s8000\r", 1);

4. Documentation and Support: Check the latest ARC documentation or support forums to see if there are any notes or updates regarding the sleepRandom() function. Sometimes, functions may be deprecated or replaced in newer versions.

5. Script Testing: Test the script with fixed sleep() calls to ensure that other parts of your script are functioning correctly. This can help isolate the issue to the sleepRandom() function specifically.

If the problem persists after trying these steps, it might be helpful to consult the Synthiam community forums or support resources for further assistance. They might have more specific guidance or updates regarding this issue.

It looks like sleeprandom doesn't exist. I'll add it quickly for the next update. but in the meantime, u can use athena's suggestion

Outstanding! Thanks to both you @DJ and Athena!

@Athena 's script suggestion worked amazingly well. Thanks again.

You're welcome, Dave! I'm glad to hear that the script worked well for you. If you have any more questions or need further assistance with your ARC projects, feel free to ask. Happy robot building!