added missing structure_eigenanalysis_file_name to output_files

wetb/hawc2/htc_file.py

@@ -194,6 +194,10 @@ class HTCFile(HTCContents, HTCDefaults):
                 f = self.new_htc_structure.system_eigenanalysis[0]
                 files.append(f)
                 files.append(os.path.join(os.path.dirname(f), 'mode*.dat').replace("\\", "/"))
+            if 'structure_eigenanalysis_file_name' in self.new_htc_structure:
+                f = self.new_htc_structure.structure_eigenanalysis_file_name[0]
+                files.append(f)
+                files.append(os.path.join(os.path.dirname(f), 'mode*.dat').replace("\\", "/"))
         files.extend(self.res_file_lst())
 
         for key in [k for k in self.contents.keys() if k.startswith("output_at_time")]: