diff --git a/cv7/program.c b/cv7/program.c
index 13dc55d..453347c 100644
--- a/cv7/program.c
+++ b/cv7/program.c
@@ -81,15 +81,21 @@ void destroy_tree(struct tree* tree){
 int main(void)
 {
 
-    struct tree *tr;
+    struct tree *tr=NULL;
 
     tr=read_tree();
+    printf("Expert z bufetu to vie.\n");
+    if(tr==NULL)
+    {
+        printf("Chybna databaza\n");
+        return 0;
+    }
     int kk;
     char t;
 
     kk=kkk(tr,0);
 
-    printf("Expert z bufetu to vie.\n");
+    
     printf("Pozna %d druhov ovocia a zeleniny.\n", kk);
 
     struct tree *p=tr;
@@ -134,3 +140,4 @@ int main(void)
 }
 
 
+