diff --git a/sv/sv0.cpp b/sv/sv0.cpp
index ad2605638..a51dc7a25 100755
--- a/sv/sv0.cpp
+++ b/sv/sv0.cpp
@@ -9,10 +9,10 @@ int main(int argc, char** argv)
   switch(n)
   {      
   case 0:
-    sv0100(argc, argv);
+    sv0100(argc, argv); // gestione tabelle del modulo
     break;
   case 3: 
-    sv0400(argc, argv);
+    sv0400(argc, argv);  // parametrizzazione modulo
     break;
   default:
     error_box("Invalid argument %s", argv[1]);
diff --git a/sv/sv0100.cpp b/sv/sv0100.cpp
index 739c45696..115ac54cb 100755
--- a/sv/sv0100.cpp
+++ b/sv/sv0100.cpp
@@ -327,10 +327,10 @@ int sv0100(int argc, char* argv[])
   TApplication::check_parameters(argc, argv);   
   if (argc > 2)
   {
-    const TFixed_string tab(argv[2]);
+    TFixed_string tab(argv[2]);
     
     TSV_tabapp* app;
-    if (tab == "PSV")
+    if (tab.upper() == "PSV")
       app = new TPSV_tabapp;
     else  
       app = new TSV_tabapp;