Trouble using script to save PSD as PNG

[brian_p_dts]

Hi all, 

I have the following code to resize and save a PSD as a PNG. It was working fine, and still works for some psds, but frequently I am getting a user Save a Copy prompt at the doc.saveAs line. Is there something I'm missing? 

var path = File.openDialog().fsName;
    app.rulerUnits = Units.PIXELS;
    var pngOpts = new PNGSaveOptions;
    try {
        var doc = app.open(File(path));
    } catch(e) {
        alert("Could not open psd file " + path + ". " + e);
        return;
    }
    if (doc.width > 1500) {
        doc.resizeImage(1500, null);
    }
    var goodPath = path.replace(/psd|b$/gi,"png");
    doc.saveAs(File(goodPath), pngOpts, true);
    doc.close(SaveOptions.DONOTSAVECHANGES);

[Stephen Marsh]

Do you have legacy save as set in your file handling preferences?

[brian_p_dts]

I did not. I tried enabling it; same result. Which should it be set at? 

[Stephen Marsh]

OK, so that wasn't the answer for the script.

It needs to be set at whatever your preference is!  :]

https://helpx.adobe.com/photoshop/using/saving-images.html#save-as

When you get the prompt, what colour mode and bit depth is the file?

[brian_p_dts]

Sorry for the lag. Color profile shows ICC. Sorry, where do I find the bit depth? It shows CMYK/8 in the file name.

[Stephen Marsh]

The CMYK/8 indicates that this is 8 BPC (also found under the Image > Mode menu).

PNG doesn't support CMYK colour mode, you need to convert a copy to RGB mode, usually the sRGB profile as the lowest common denominator.