1) used Environment input argument to GiveCPUnumber to fix bug with hybrid unix/windows clusters;

2) removed return after failure of ping; some machines like hal can be connected but do not allow ping;
(cherry picked from commit 0fb68813)

matlab/parallel/AnalyseComputationalEnvironment.m

@@ -189,13 +189,13 @@ for Node=1:length(DataInput) % To obtain a recoursive function remove the 'for'
         end
         
         if (si1)
-            disp(['It is impossibile to be connected to the computer with name "',DataInput(Node).ComputerName,'" using the network!']);
+            disp(['It is impossibile to ping to the computer with name "',DataInput(Node).ComputerName,'" using the network!']);
             disp(' ');
             disp('ErrorCode 3.');
             ErrorCode=3;
             disp(' ');
             disp(' ');
-            return;
+%             return;
         else
             disp('Check on ComputerName Variable ..... Ok!');
             disp(' ');
@@ -609,13 +609,13 @@ for Node=1:length(DataInput) % To obtain a recoursive function remove the 'for'
     
     RealCPUnbr='';
 %    keyboard;
-    RealCPUnbr=GiveCPUnumber(de0);
+    RealCPUnbr=GiveCPUnumber(de0,Environment);
     
     % Questo controllo penso che si possa MIGLIORARE!!!!!
     if  isempty (RealCPUnbr) && Environment==0,
         [si0 de0]=system(['psinfo \\',DataInput(Node).ComputerName]);
     end        
-    RealCPUnbr=GiveCPUnumber(de0);
+    RealCPUnbr=GiveCPUnumber(de0,Environment);
 
     if  isempty (RealCPUnbr)
         % An error occurred when we try to know the Cpu/Cores

matlab/parallel/GiveCPUnumber.m

-function [nCPU]= GiveCPUnumber (ComputerInformations)
+function [nCPU]= GiveCPUnumber (ComputerInformations, Environment)
 % PARALLEL CONTEXT
 % In a parallel context this function return the CPUs or cores numer avaiable
 % on the computer used for run parallel code.
@@ -33,13 +33,13 @@ function [nCPU]= GiveCPUnumber (ComputerInformations)
 
 nCPU='';
 
-Enviroment=-1;
-
+if nargin < 2,
 % Determine a specific operating system or software version when necessary
 % for different command (sintax, name, ...).
-Enviroment=~ispc; %isunix || (~matlab_ver_less_than('7.4') && ismac);
+Environment=~ispc; %isunix || (~matlab_ver_less_than('7.4') && ismac);
+end
 
-switch Enviroment
+switch Environment
   case 0          %WINDOWS OPERATING SYSTEM
     
     OffSet=27;