diff --git a/dblayer.php b/dblayer.php
index b0af1ee..020a486 100644
--- a/dblayer.php
+++ b/dblayer.php
@@ -559,6 +559,10 @@ class dblayer
     if ($this->sep === "")
       throw new Exception (dgettext("domframework", "Database not connected"),
                            500);
+    if ($this->table === null)
+      throw new \Exception (dgettext("domframework",
+                            "No table name defined to insert in the table"),
+                            500);
     if ($this->unique === null)
       throw new Exception (dgettext("domframework",
                            "Unique fields of table are not defined"), 500);
@@ -657,6 +661,9 @@ class dblayer
     if ($this->sep === "")
       throw new Exception (dgettext("domframework", "Database not connected"),
                            500);
+    if ($this->table === null)
+      throw new \Exception (dgettext("domframework",
+                            "No table name defined to read the table"), 500);
     if ($select !== null && !is_array ($select))
       throw new Exception (dgettext("domframework",
                            "Select information provided is not an array"),
@@ -824,6 +831,10 @@ class dblayer
     if ($this->sep === "")
       throw new Exception (dgettext("domframework", "Database not connected"),
                            500);
+    if ($this->table === null)
+      throw new \Exception (dgettext("domframework",
+                            "No table name defined to update in the table"),
+                            500);
     if (count ($this->fields) === 0)
       throw new Exception (dgettext("domframework", "No Field defined"), 500);
     if ($this->primary === null)
@@ -920,6 +931,10 @@ class dblayer
     if ($this->debug) echo "== Entering delete\n";
     if ($this->sep === "")
       throw new Exception (dgettext("domframework", "Database not connected"));
+    if ($this->table === null)
+      throw new \Exception (dgettext("domframework",
+                            "No table name defined to delete in the table"),
+                            500);
     $deletekey = $this->hookpredelete ($deletekey);
     $req = "DELETE FROM $this->sep$this->tableprefix$this->table$this->sep ";
     $req .= "WHERE $this->primary = :primary";
@@ -960,6 +975,9 @@ class dblayer
     if ($this->debug) echo "== Entering dropTables\n";
     if ($this->sep === "")
       throw new Exception (dgettext("domframework", "Database not connected"));
+    if ($this->table === null)
+      throw new \Exception (dgettext("domframework",
+                            "No table name defined to drop the table"), 500);
     $sql = "DROP TABLE $this->sep$this->tableprefix$this->table$this->sep";
     if ($this->debug)
       echo "$sql\n";
@@ -990,6 +1008,9 @@ class dblayer
                            500);
     if (count ($this->fields) === 0)
       throw new Exception (dgettext("domframework", "No Field defined"), 500);
+    if ($this->table === null)
+      throw new \Exception (dgettext("domframework",
+                            "No table name defined to create the table"), 500);
     switch (self::$instance[$this->dsn]->getAttribute(PDO::ATTR_DRIVER_NAME))
     {
     case "sqlite":