What is the best script to use to wait for the Bounce To Mix window to close and then continue?

@John_Costello,

Try this;

//Bounce Variables
const bounceDirectory = 'Bounced Files/';
const bounceSource = 'MacBook Pro Speakers 1-2(Stereo)';

//For sending text message;
const recipientPhoneNumber = '9999999999';
const senderIcloudEmail = 'test@test.com';
const messageText = 'Your Epic bounce script has finished. Time to get back to the studio.';

const bounceWin = sf.ui.proTools.windows.whoseTitle.is('Bounce Mix').first;

function maximiseBounceWindow() {
    const bounceWin = sf.ui.proTools.windows.whoseTitle.is('Bounce Mix').first;

    const audioPanel = bounceWin.groups.whoseTitle.is('Audio').first;

    function openAudioPanel() {
        if (audioPanel.buttons.whoseTitle.is('Collapser').exists) {
            audioPanel.buttons.whoseTitle.is('Collapser').first.elementClick();
        }
    }
    const locationPanel = bounceWin.groups.whoseTitle.is('Location').first;

    function openLocationPanel() {
        if (locationPanel.buttons.whoseTitle.is('Collapser').exists) {
            locationPanel.buttons.whoseTitle.is('Collapser').first.elementClick();
        }
    }

    switch (bounceWin.frame.h) {
        case 268:
            openAudioPanel();
            openLocationPanel();
            break;
        case 406:
            openLocationPanel();
            break;
        case 393:
            openAudioPanel();
            break;
    }
}

function doBounce(bounceSettings) {
    const { bounceName, bounceSuffix, trackToMute, trackMuteTarget, bounceSource, presetNum, bounceDirectory,
 } = bounceSettings;

    sf.ui.proTools.trackGetByName({
        name: trackToMute,
        makeVisible: true
    }).track.trackSetMute({
        targetValue: trackMuteTarget,
    });

    sf.ui.proTools.menuClick({ menuPath: ["File", "Bounce Mix..."], });

    bounceWin.elementWaitFor();

    maximiseBounceWindow();

    bounceWin.buttons.whoseTitle.is('Preset Toggle').allItems[presetNum - 1].elementClick();

    bounceWin.textFields.first.elementSetTextFieldWithAreaValue({
        value: bounceName + ' - ' + bounceSuffix,
    });

    const locationPanel = bounceWin.groups.whoseTitle.is('Location').first;

    if (locationPanel.textFields.first.value.invalidate().value !== bounceDirectory) {
        locationPanel.textFields.first.elementSetTextFieldWithAreaValue({ value: bounceDirectory });
    }

    bounceWin.buttons.whoseTitle.is('Bounce').first.elementClick();


    const mp3Window = sf.ui.proTools.windows.whoseTitle.is('MP3').first;

    mp3Window.elementWaitFor({
        waitType: 'Appear',
        pollingInterval: 10,
        timeout: 100,
        onError: 'Continue'
    });

    if (mp3Window.buttons.whoseTitle.is('OK').first.exists) {
        mp3Window.buttons.whoseTitle.is('OK').first.elementClick();

        mp3Window.elementWaitFor({ waitType: 'Disappear' })
    };

    bounceWin.elementWaitFor({ waitType: 'Disappear' })

    sf.ui.proTools.waitForNoModals();
}

function exportClips() {
    sf.ui.proTools.mainWindow.invalidate();

    const sessionDirectory = sf.ui.proTools.mainWindow.sessionPath.split('/').slice(0, -1).join('/').slice(1);

    sf.ui.proTools.mainWindow.popupButtons.whoseTitle.is('Clip List').first.popupMenuSelect({
        menuPath: ["Clear Find"],
    });

    try {
        sf.ui.proTools.mainWindow.popupButtons.whoseTitle.is('Clip List').first.popupMenuSelect({
            menuPath: ["Expor Clips as Files..."],
        });
    } catch (err) {
        sf.keyboard.press({
            keys: "cmd+shift+k",
        });
    }

    const win = sf.ui.proTools.windows.whoseTitle.is('Export Selected').first;

    win.elementWaitFor();

    const popupButtons = win.children.filter(button => button.fullRole == "AXPopUpButton");

    const sampleRate = popupButtons[0];
    const bitDepth = popupButtons[1];
    const fileFormat = popupButtons[2];
    const fileTypeBtn = popupButtons[3];

    if (fileTypeBtn.value.value != 'WAV')
        fileTypeBtn.popupMenuSelect({ menuPath: ['WAV'] });

    if (fileFormat.value.value != 'Interleaved')
        fileFormat.popupMenuSelect({ menuPath: ['Interleaved'] });

    if (bitDepth.value.value != '24 Bit')
        bitDepth.popupMenuSelect({ menuPath: ['24 Bit'] });

    if (sampleRate.value.value != '48 kHz')
        sampleRate.popupMenuSelect({ menuPath: ['48 kHz'] });

    win.buttons.whoseTitle.is('Choose...').first.elementClick();

    const openDlg = sf.ui.proTools.windows.whoseTitle.is('Open').first;
    const sheet = openDlg.sheets.first;

    openDlg.elementWaitFor();

    sf.keyboard.type({ text: '/' });

    sf.keyboard.type({ text: sessionDirectory + '/Bounced Files' });

    sf.wait({ intervalMs: 500 });

    sheet.buttons.whoseTitle.is('Go').first.elementClick({}, 'Could not click "Go"');

    sf.ui.proTools.windows.whoseTitle.is('Open').first.getElement('AXDefaultButton').elementClick();

    win.buttons.whoseTitle.is('Export...').first.elementClick();

    win.elementWaitFor({ waitType: 'Disappear' });

    sf.ui.proTools.waitForNoModals();
}

function sendTextMessage() {
    sf.system.execAppleScript({
        script: `
        tell application "Messages"
            send "${messageText}" to buddy "${recipientPhoneNumber}" of service "E:${senderIcloudEmail}"
        end tell`
    });
}

function commitStems() {
    sf.soundflow.runCommand({
        commandId: 'user:ckfldmfi900002p10aqtdyo1z:ckfjjq34x00030y103bt2x0cg',
        props: {
            commitOrFreeze: "Commit",
            insertChoice: "J",
            commitRoutingFolders: true,
            multipleTracksProcessMode: "As a Group",
            commitTarget: "Edit Selection",
            commitAction: "Do Nothing",
            commitConsolidateClips: false,
            commitOffline: false,
        }
    });

    sf.soundflow.runCommand({
        commandId: 'user:ckfhimahc000g8n100ey7v88x:ckdv1td13000dyq10taeszpsg',
        props: {
            windowEnum: "Edit",
        }
    });

    sf.ui.proTools.clipConsolidate();

    sf.ui.proTools.waitForNoModals();
}

function main() {
    const sessionDirectory = sf.ui.proTools.mainWindow.sessionPath.split('/').slice(0, -1).join('/').slice(1);

    //Prompt for Bounce Name and store in variable.
    const bounceName = prompt('Please enter bounce name.')
    if (bounceName == "null" || bounceName == null) throw `No name was entered... Bounce has been canceled`;

    sf.ui.proTools.appActivateMainWindow();

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

    //Variables for Full Mix bounce
    const fullMixBounceSettings = {
        bounceName: bounceName,
        bounceSuffix: 'Full Mix',
        trackToMute: 'Vox Master',
        trackMuteTarget: 'Disable',
        bounceSource: bounceSource,
        presetNum: 1,
        bounceDirectory: 'Bounced Files/',
    };

    doBounce(fullMixBounceSettings);

    //Variables for Instrumental bounce
    const InstrumentalBounceSettings = {
        bounceName: bounceName,
        bounceSuffix: 'Instrumental',
        trackToMute: 'Vox Master',
        trackMuteTarget: 'Enable',
        bounceSource: bounceSource,
        presetNum: 1,
        bounceDirectory: 'Bounced Files/',
    };

    doBounce(InstrumentalBounceSettings);

    //Variables for Non Instrumental bounce
    const sixteenFourtyFourBounceSettings = {
        bounceName: bounceName,
        bounceSuffix: '16-44',
        trackToMute: 'Vox Master',
        trackMuteTarget: 'Disable',
        bounceSource: bounceSource,
        presetNum: 2,
        bounceDirectory: 'Bounced Files/',
    };

    doBounce(sixteenFourtyFourBounceSettings);

    commitStems();

    exportClips();

    sf.directory.open({ path: sessionDirectory + '/Bounced Files' })

    sendTextMessage();
}

main();

UPDATED