diff --git a/main.cpp b/main.cpp
index 7cf8522..8f0df86 100644
--- a/main.cpp
+++ b/main.cpp
@@ -53,7 +53,7 @@ void logo()
     <<"   /  \\/ / _` / __|/ _` | |\n"
     <<"  / /\\  / (_| \\__ \\ (_| | |\n"
     <<"  \\_\\ \\/ \\__,_|___/\\__,_|_|\n"
-    <<"nasal ver : "<<__nasver<<"\n"
+    <<"nasal ver : "<<__nasver<<" ("<<__DATE__<<")\n"
     <<"c++ std   : "<<__cplusplus<<"\n"
     <<"thanks to : https://github.com/andyross/nasal\n"
     <<"code repo : https://github.com/ValKmjolnir/Nasal-Interpreter\n"
diff --git a/nasal_builtin.h b/nasal_builtin.h
index 69243ca..a8d31ef 100644
--- a/nasal_builtin.h
+++ b/nasal_builtin.h
@@ -133,8 +133,7 @@ nas_ref builtin_split(nas_ref* local,nasal_gc& gc)
         gc.temp=nil;
         return res;
     }
-    usize last=0;
-    usize pos=s.find(deli,last);
+    usize last=0,pos=s.find(deli,0);
     while(pos!=string::npos)
     {
         if(pos>last)
diff --git a/nasal_import.h b/nasal_import.h
index 1b38c41..2fce7fc 100644
--- a/nasal_import.h
+++ b/nasal_import.h
@@ -34,8 +34,7 @@ nasal_import::nasal_import(nasal_err& e):lib_loaded(false),nerr(e){
     char sep=':';
 #endif
     string PATH=getenv("PATH");
-    usize last=0;
-    usize pos=PATH.find(sep,last);
+    usize last=0,pos=PATH.find(sep,0);
     while(pos!=string::npos)
     {
         string dirpath=PATH.substr(last,pos-last);
diff --git a/stl/file.nas b/stl/file.nas
index ddd7de5..850a8c4 100644
--- a/stl/file.nas
+++ b/stl/file.nas
@@ -5,6 +5,8 @@ var file={
     SEEK_CUR:io.SEEK_CUR,
     SEEK_END:io.SEEK_END,
     new: func(filename,mode="r"){
+        if(!io.exists(filename))
+            return nil;
         var fd=io.open(filename,mode);
         return {
             close:  func(){io.close(fd);},
@@ -24,6 +26,8 @@ var file={
 };
 
 var find_all_files=func(path){
+    if(!io.exists(path))
+        return [];
     var dd=unix.opendir(path);
     var res=[];
     while(var n=unix.readdir(dd))