A computer implemented method of assuring correctness of data updated at a remote server and used by a local application, comprising one or more processors at a client terminal adapted to receive from a remote server updated values for a plurality of data items associated with a dataset required for execution of an application executed by the processor(s) where the dataset defines a close relation among the plurality of associated data items, determine whether the reception includes updated values for all of the associated data items, retrieve automatically from a local memory resource, previous values for all of the associated data items in case the updated value is missing for at least one of the associated data items and provide to the application the updated values or the previous values according to the determination.