diff --git a/src/zabapgit_object_sicf.prog.abap b/src/zabapgit_object_sicf.prog.abap
index 51a09b31e..fc4fd2a78 100644
--- a/src/zabapgit_object_sicf.prog.abap
+++ b/src/zabapgit_object_sicf.prog.abap
@@ -407,6 +407,11 @@ CLASS lcl_object_sicf IMPLEMENTATION.
       RETURN.
     ENDIF.
 
+    IF ls_icfservice-icfparguid CO '0'.
+* not supported by the SAP standard API
+      lcx_exception=>raise( 'SICF - cannot delete root node, delete node manually' ).
+    ENDIF.
+
     cl_icf_tree=>if_icf_tree~delete_node(
       EXPORTING
         icfparguid                  = ls_icfservice-icfparguid