Typo and flat file with .out extension

tracy/tools/soltracy.cc

@@ -188,7 +188,7 @@ int main(int argc, char *argv[]) {
     LoadFieldErrs(UserCommandFlag[i].fe_file, true, 1.0, true, 1);
 	
     Ring_GetTwiss(true, 0.0);
-    prtmfile("flat_file_fefile.dat");
+    prtmfile("flat_file_fefile.out");
   }
 
   // read multipole errors from a file; specific for soleil lattice