Script that determines the nearest Pro Tools Marker to the parked cursor & copy/pastes the name of the marker to the enabled record track.

Hello Dane,
Sorry I took so long,
try this,

function timeCounter() {

    // get current counter
    const mainCounter = sf.ui.proTools.getCurrentTimecode().stringValue

    let originalTimeCounter
    /// Bars Beats .  
    if (mainCounter.includes("|")) originalTimeCounter = "Bars|Beats"
    //  Min Secs .    
    else if (mainCounter.includes(":") && mainCounter.includes(".")) originalTimeCounter = "Min:Secs"
    //  Time code
    else if (mainCounter.split(":").length == 4) originalTimeCounter = "Timecode"
    //  Feet+Frames
    else if (mainCounter.includes("+")) originalTimeCounter = "Feet+Frames"
    //  Samples.     
    else originalTimeCounter = "Samples"

    return originalTimeCounter
}




function getNextMarkerName(selection) {
    let nextMemLoc
    sf.ui.proTools.memoryLocationsEnsureWindow({
        restoreWindowOpenState: true,
        action: () => {

            nextMemLoc = sf.proTools.memoryLocationsFetch().collection['List'].slice().find(m =>
                m.mainCounterValue >= selection.selectionStart
            );
        }
    });
    return nextMemLoc ? nextMemLoc["name"] : undefined
};


function getRecordEnabledTracks() {

    const visibleTracks = sf.ui.proTools.visibleTrackHeaders

    const recTrack = visibleTracks.find(tr => {
        const recButton = tr.buttons.whoseTitle.is("Track Record Enable").first
        return recButton.exists && recButton.value.invalidate().value.includes("on state")
    });
    return recTrack
}

function getSessionInfo() {
    try {

        // Get user info
        this.originalTimeCounter = timeCounter();
        this.originalSelectedTracks = sf.ui.proTools.selectedTrackHeaders;

        // Get info
        this.recordEnabledTrack = getRecordEnabledTracks();
        //Set samples, setting here will prevent from changing more than once.
        sf.ui.proTools.mainCounterSetValue({ targetValue: "Samples" });
        this.currentSelection = sf.ui.proTools.selectionGetInSamples();
        this.nextMarkerName = getNextMarkerName(this.currentSelection);

        //Functions and set user original
        this.renameRecTrack = () => {
            this.recordEnabledTrack.trackSelect();
            this.recordEnabledTrack.trackScrollToView();
            this.recordEnabledTrack.trackBulkRename({ newName: this.nextMarkerName });
            sf.ui.proTools.invalidate();
        };


        this.setUserOriginals = () => {
            const originalSelected = this.originalSelectedTracks;

            if (originalSelected.length > 0) {

                // Selected Track
                originalSelected[0].trackSelect();
                originalSelected[0].trackScrollToView();
                sf.ui.proTools.trackSelectByName({ names: originalSelected.map(th => th.normalizedTrackName) });
            };
            //user counter
            sf.ui.proTools.mainCounterSetValue({ targetValue: this.originalTimeCounter });

        };

    } catch (err) {
        throw err
    };
};

function main() {

    sf.ui.proTools.appActivateMainWindow();
    sf.ui.proTools.invalidate();

    const session = new getSessionInfo();
    try {
        if (!session.recordEnabledTrack) { alert("No record track found."); throw 0 };
        if (!session.nextMarkerName) { alert("No More Memory Locations."); throw 0 };

        session.renameRecTrack();
    } catch (err) {
        throw err

    } finally {

        session.setUserOriginals();
    };

};

main();