Any way of capturing warnings/errors from endSuppressDialogs ? (app.open())

I have some .aep files which may generate one or more warnings upon opening, but I also want to be able to react to these warnings from the script.

E.g. when I open this one project, I get 2 warnings:

1. "this project must be converted from version 11.0.4 (Macintosh 64). The original file will be unchanged"
2. "The following layer dependencies are missing: (font references)"

The script goes something like:

var projectPath = "D:\\path\\to\\project.aep";

app.project.close(CloseOptions.DO_NOT_SAVE_CHANGES);

try

{

    app.beginSuppressDialogs(); // otherwise it will wait for UI interaction

    app.open(new File(projectPath));

}

catch (err)

{

    // this will hit if the file does not exist etc

    console.log("oops, something happened: " + err.message);

}

finally

{

    app.endSuppressDialogs(false); // if true it will show an alert (2), about the missing deps

}

Is there any way of retrieving these warnings? It would make more sense if app.endSuppressDialogs(false) actually returned the warnings, but it just returns null.