Hello John, I am total noob here to all this FS stuff. Never found resolution to my problem - but did find a workaround.
Running compiler helper showed parse complete but bgl compiler never generated a bgl file (anywhere on the computer).
I discovered Scruffyducks Xml2Bgl utility and when used with the BGL compiler - it did generate the bgl file needed.
I am on old acer laptop , win 7 32 bit. Have not tried it on the wife's HP win 7 64 bit as yet.
I do have to run this as admin to get it to work. From what I have discovered your using this on FSX should work ok as others have reported succ