diff --git a/sigi/apps/eventos/admin.py b/sigi/apps/eventos/admin.py
index faf03dd..33300f3 100644
--- a/sigi/apps/eventos/admin.py
+++ b/sigi/apps/eventos/admin.py
@@ -345,9 +345,20 @@ class EventoAdmin(CartExportMixin, admin.ModelAdmin):
 
     def gant_report(self, request, object_id):
         evento = get_object_or_404(Evento, id=object_id)
+        change_url = (
+            reverse(
+                "admin:%s_%s_change" % self.get_model_info(), args=[object_id]
+            )
+            + "?"
+            + self.get_preserved_filters(request)
+        )
         cronograma = list(
             evento.cronograma_set.order_by("data_prevista_inicio")
         )
+        if not cronograma:
+            self.message_user(request, _("Não há um cronograma definido para a realização deste evento. Impossível gerar um gráfico de Gant"), messages.ERROR)
+            return redirect(change_url)
+        
         inicio = min(
             cronograma[0].data_prevista_inicio,
             cronograma[0].data_inicio or cronograma[0].data_prevista_inicio,
@@ -377,9 +388,20 @@ class EventoAdmin(CartExportMixin, admin.ModelAdmin):
 
     def checklist_report(self, request, object_id):
         evento = get_object_or_404(Evento, id=object_id)
+        change_url = (
+            reverse(
+                "admin:%s_%s_change" % self.get_model_info(), args=[object_id]
+            )
+            + "?"
+            + self.get_preserved_filters(request)
+        )
         cronograma = list(
             evento.cronograma_set.order_by("data_prevista_inicio")
         )
+        if not cronograma:
+            self.message_user(request, _("Não há um cronograma definido para a realização deste evento. Impossível gerar um checklist"), messages.ERROR)
+            return redirect(change_url)
+
         context = {"cronograma": cronograma, "title": evento.nome}
         return WeasyTemplateResponse(
             filename="checklist.pdf",
@@ -391,8 +413,22 @@ class EventoAdmin(CartExportMixin, admin.ModelAdmin):
 
     def plano_comunicacao(self, request, object_id):
         evento = get_object_or_404(Evento, id=object_id)
+        change_url = (
+            reverse(
+                "admin:%s_%s_change" % self.get_model_info(), args=[object_id]
+            )
+            + "?"
+            + self.get_preserved_filters(request)
+        )
+        cronograma = list(
+            evento.cronograma_set.order_by("data_prevista_inicio")
+        )
+        if not cronograma:
+            self.message_user(request, _("Não há um cronograma definido para a realização deste evento. Impossível gerar um plano de comunicação"), messages.ERROR)
+            return redirect(change_url)
+
         matrix = {}
-        for etapa in evento.cronograma_set.order_by("data_prevista_inicio"):
+        for etapa in cronograma:
             for responsavel in etapa.responsaveis.splitlines():
                 if responsavel not in matrix:
                     matrix[responsavel] = {}
diff --git a/sigi/apps/eventos/templates/admin/eventos/evento/change_form.html b/sigi/apps/eventos/templates/admin/eventos/evento/change_form.html
index bcf9662..1ca5700 100644
--- a/sigi/apps/eventos/templates/admin/eventos/evento/change_form.html
+++ b/sigi/apps/eventos/templates/admin/eventos/evento/change_form.html
@@ -28,27 +28,29 @@
         {% trans "Declaração" %}
       </a>
     </li>
-    <li>
-      {% url opts|admin_urlname:'gantreport' object_id|admin_urlquote as tool_url %}
-      <a href="{% add_preserved_filters tool_url %}">
-        <i class="left material-icons" aria-hidden="true">insert_chart</i>
-        {% trans "Gráfico de Gant" %}
-      </a>
-    </li>
-    <li>
-      {% url opts|admin_urlname:'checklistreport' object_id|admin_urlquote as tool_url %}
-      <a href="{% add_preserved_filters tool_url %}">
-        <i class="left material-icons" aria-hidden="true">picture_as_pdf</i>
-        {% trans "Checklist" %}
-      </a>
-    </li>
-    <li>
-      {% url opts|admin_urlname:'comunicacaoreport' object_id|admin_urlquote as tool_url %}
-      <a href="{% add_preserved_filters tool_url %}">
-        <i class="left material-icons" aria-hidden="true">picture_as_pdf</i>
-        {% trans "Plano de comunicação" %}
-      </a>
-    </li>
+    {% if object.cronograma_set.exists %}
+      <li>
+        {% url opts|admin_urlname:'gantreport' object_id|admin_urlquote as tool_url %}
+        <a href="{% add_preserved_filters tool_url %}">
+          <i class="left material-icons" aria-hidden="true">insert_chart</i>
+          {% trans "Gráfico de Gant" %}
+        </a>
+      </li>
+      <li>
+        {% url opts|admin_urlname:'checklistreport' object_id|admin_urlquote as tool_url %}
+        <a href="{% add_preserved_filters tool_url %}">
+          <i class="left material-icons" aria-hidden="true">picture_as_pdf</i>
+          {% trans "Checklist" %}
+        </a>
+      </li>
+      <li>
+        {% url opts|admin_urlname:'comunicacaoreport' object_id|admin_urlquote as tool_url %}
+        <a href="{% add_preserved_filters tool_url %}">
+          <i class="left material-icons" aria-hidden="true">picture_as_pdf</i>
+          {% trans "Plano de comunicação" %}
+        </a>
+      </li>
+    {% endif %}
   {% endif %}
   {{ block.super }}
 {% endblock %}