Issue with textHeight property of the TextMeasure Object.

[Joshua_F]

We have been using the method below for years to determine whether a piece is landscape or portrait for some handouts. Testing out FP11 and so far this is the only thing that I've noticed that is causing issues with our code.

var item = CreateResource(path("_graphics") + itemNumberFD,'graphic',true);

// Determine if the item graphic is landscape or portrait
formatFD = GetOrientation(item,localOrientation);

function GetOrientation(res, fallback){
  // Text Measure doesn't run in validation so set a fall back
  // orientation to return in local dev. If the param is null
  // return 'portrait' orientation
  var fallback = fallback || "portrait";
     try{
       if (!res instanceof FusionProResource)
         throw "Not a resource: " + res;

       if (!res.exists)
         throw "Resource not found: " + res;

       var TM = new FusionProTextMeasure;
       TM.useTags = true;

      var err=TM.CalculateTextExtent(res.content);
      if (err)
        throw "Error measuring resource: " + res + ": " + TM.messages;

      Print(res + ": Width=" + TM.textWidth + ", Depth=" + TM.textHeight);
      var isLandscape = (TM.textWidth > TM.textHeight);
      return (isLandscape) ? "landscape" : "portrait";
    }
    catch(e){
      return fallback;
    }
 }

In the logs on composition, we're getting

The amount of text inserted into a flow exceeds the depth of all frames in the flow <>. Text is truncated. Text does not fit in the last frame on page 0 at (0 in, 0 in). Resource("../_graphics/BFH-059.pdf"): Width=81000, Depth=0

Running FusionPro VDP Server 11.2.1 on a Mac OS 10.13.6 High Sierra.
I've tried passing strings through that FusionProTextMeasure constructor and still get a textHeight property of 0.