I have the latest version of DNRGPS (downloaded 1.june 2012). I try to export gpx-tracks to a file geodatabase. I choose the option multipart line. There are no errors from DNRGPS. But when i try to open the feature class in ArcGIS desktop, I get the error:

"Error opening feature class
The item does not hav a definiton. ["featureclassname"]
The item does not have a defintion.
The XML beeing loaded could not be parsed. [physical name: "featureclassname"]."