I have built simulation model and its was running well till last week. This week, I used EKL to upload some NC machine activities to speed up model build but after importing the EKL, my model got freeze and it's not running now. Now if I run the model, it's not working. Is there any way we can recover last week file with history details. Unfortunately, I have not created any revision of it before uploading the EKL and its single file.