Remove Mission Problem

Hi, After I disarmed in between the mission, as I plan to remove the mission plan from the vehicle this error occurs every time "errorMsg(Vehicle remove all failed. Error: Unspecified error.)" . But after the completion of a mission, if I try to remove the plan, it works fine with no error. Why is it that every time it occurs when I didn’t complete the mission and trying to remove it? Helps would be appreciated.