When information is not properly obtained or retrieved, it is called a retrieval error. This means there was a problem or failure in the data or information retrieval process. This error can be caused by various factors such as a poor connection, a system malfunction, external interference, or human error. It can lead to detrimental consequences, such as the loss of important data or disruption of ongoing operations. To minimize the risk of retrieval errors, it is essential to implement appropriate security and reliability measures, as well as train staff on proper data handling and backup procedures.