diff --git a/src/ce_common.pas b/src/ce_common.pas
index 8a272d06..3c8a8112 100644
--- a/src/ce_common.pas
+++ b/src/ce_common.pas
@@ -218,20 +218,21 @@ constructor TCheckedAsyncProcess.Create(aOwner: TComponent);
 begin
   inherited;
   fTimer := TIdleTimer.Create(self);
-  fTimer.Interval:=50;
-  fTimer.Enabled:=false;
-  fTimer.OnTimer:=@checkTerminated;
+  fTimer.Enabled := false;
+  fTimer.Interval :=50;
+  fTimer.AutoEnabled := false;
 end;
 
 procedure TCheckedAsyncProcess.Execute;
 begin
+  if OnTerminate <> nil then fTimer.Enabled :=true;
+  fTimer.OnTimer := @checkTerminated;
   inherited;
-  if OnTerminate <> nil then
-    fTimer.Enabled:=true;
 end;
 
 procedure TCheckedAsyncProcess.checkTerminated(sender: TObject);
 begin
+  if Running then exit;
   if OnTerminate = nil then exit;
   fTimer.Enabled:=false;
   OnTerminate(Self);
diff --git a/src/ce_staticexplorer.pas b/src/ce_staticexplorer.pas
index b40001dc..679360db 100644
--- a/src/ce_staticexplorer.pas
+++ b/src/ce_staticexplorer.pas
@@ -23,7 +23,7 @@ type
     procedure TreeFilterEdit1AfterFilter(Sender: TObject);
     procedure TreeKeyPress(Sender: TObject; var Key: char);
   private
-    fDmdProc: TAsyncProcess;
+    fDmdProc: TCheckedAsyncProcess;
     fLogMessager: TCELogMessageSubject;
     fActRefresh: TAction;
     fActRefreshOnChange: TAction;
@@ -353,7 +353,7 @@ begin
 
   // standard process options
   killProcess(fDmdProc);
-  fDmdProc := TAsyncProcess.Create(nil);
+  fDmdProc := TCheckedAsyncProcess.Create(nil);
   fDmdProc.ShowWindow := swoHIDE;
   fDmdProc.Options := [];
   fDmdProc.Executable := 'dmd';