bug fix the ls does not find the target file or folder

matlab/parallel/dynareParallelDir.m

@@ -29,8 +29,15 @@ for indPC=1:length(Parallel),
     if isunix || (~matlab_ver_less_than('7.4') && ismac),
         if Parallel(indPC).Local==0,
             [check, ax]=system(['ssh ',Parallel(indPC).user,'@',Parallel(indPC).PcName,' ls ',Parallel(indPC).RemoteFolder,'/',PRCDir,'/',filename]);
+            if check ~ 0
+                ax=[];
+            end
         else
+            try
                 ax=ls(filename);
+            catch
+                ax=[];
+            end
             
         end
         dirlist = [dirlist, ax];