1 files changed, 1 insertions, 0 deletions
diff --git a/sourcecodes/network_layout_inv.php b/sourcecodes/network_layout_inv.php
index d457212e..4b0be904 100644
--- a/sourcecodes/network_layout_inv.php
+++ b/sourcecodes/network_layout_inv.php
@@ -53,6 +53,7 @@ $datamat=array();
 $data_read=array();
  
 $node=trim($str_arrmat[0]);
+$node=is_numeric($node) ? $node : 0;
 $width=150;
 $height=150;
 $font=12;