diff --git a/packages/sim-entrada-eventos/aplication/Sim.controller.ts b/packages/sim-entrada-eventos/aplication/Sim.controller.ts
index 4ea864d..a4b198d 100644
--- a/packages/sim-entrada-eventos/aplication/Sim.controller.ts
+++ b/packages/sim-entrada-eventos/aplication/Sim.controller.ts
@@ -79,7 +79,7 @@ export class SimController {
             ...usecaseResult.error
           }
         }).send()
-        args.onError(body, usecaseResult.error.msg.message)
+        args.onError(body, usecaseResult.error?.msg?.message ?? "Error indefinido")
         return 1;
       }