The view or its master was not found or no view engine supports the searched locations

Question

Error like:The view \'LoginRegister\' or its master was not found or no view engine supports the searched locations. The following locations were searched:

Answer 1

If the problem happens intermittently in production, it could be due to an action method getting interrupted. For example, during a POST operation involving a large file upload, the user closes the browser window before the upload completes. In this case, the action method may throw a null reference exception resulting from a null model or view object. A solution would be to wrap the method body in a try/catch and return null. Like this:

[HttpPost]
public ActionResult Post(...)
{
    try
    {
        ...
    }
    catch (NullReferenceException ex)  // could happen if POST is interrupted
    {
        // perhaps log a warning here
        return null;
    }

    return View(model);
}