I do a simulation using the Hay transposition model for the calculation of the incident irradiance on a tilted plane and save the project. The transposition model is mentioned in the report (if activated under preferences). I leave the project, change the transposition model to Perez and open the project again. Now, when i am going to open the report again - without doing the simulation again - the transposition model mentioned in the report is Perez but the results of the report have been caclulated with Hay. In my oppinion this problem should be solved, because if there are several users at one workstation, changing the transposition model, there might occur some missunderstandings.