The results of a simulation are overwritten when a new simulation starts. If you want to retain results, for instance to be able to compare old and new results, you can create a simulation result archive.

An archive is created from the [[user_interface#data_output_screens|result panel]] of either the [[tables screen]] or the [[charts screen]], by right-clicking the folder for the results you wish to archive and choosing **Create archive** from the menu. 

====See also====

  * [[Charts screen#Archives and exporting data]]