- add error msg for expressions "der(der(DAE.CREF(_))", see Bug [#1551]

git-svn-id: https://openmodelica.org/svn/OpenModelica/trunk@9245 f25d12d1-65f4-0310-ae8a-bbce733d8d8e
OpenModelica · Jun 4, 2011 · e44740f · e44740f
1 parent 779da9d
commit e44740f
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/Compiler/BackEnd/BackendDAECreate.mo b/Compiler/BackEnd/BackendDAECreate.mo
@@ -2710,6 +2710,14 @@ algorithm
       DAE.FunctionTree funcs;
       DAE.Exp e1;
       list<DAE.ComponentRef> newStates;
+      DAE.ComponentRef cr;
+      String str;
+    case((DAE.CALL(Absyn.IDENT(name = "der"),{DAE.CALL(Absyn.IDENT(name = "der"),{e1 as DAE.CREF(componentRef=cr)},tuple_ = false,builtin = true)},tuple_ = false,builtin = true),(vars,funcs)))
+      equation
+        str = ComponentReference.crefStr(cr);
+        str = stringAppendList({"The model includes derivatives of order > 1 for: ",str,". That is not supported. Real d", str, " = der(", str, ") *might* result in a solvable model"});
+        Error.addMessage(Error.INTERNAL_ERROR, {str});
+      then fail();      
     case((DAE.CALL(Absyn.IDENT(name = "der"),{e1},tuple_ = false,builtin = true),(vars,funcs)))
       equation
         e1 = Derive.differentiateExpTime(e1,(vars,funcs));