P50/P90 Simulation Error

Hi All,

I am trying to do a P50/P90 simulation for a custom data set with minimum 10 weather files in a folder. I have followed the naming conventions for the wind weather files and each file is in a .csv file. I am able to simulate the individual weather files but cannot run the P50/P90 simulation as I get the below error message;

""Invalid File P50/P90 simulations do not work with the file extension. Only csv, srw, smw, epw amnd tm2 file extensions are supported. please remove any files with invalid extensions from the weather file folder.""

I have attached the zip file I am using.

Any help would be appreciated!