Dear Carmen and Brice, It may be that the lst file is too big for the editor to manage. You can look in Windows Explorer to find the .lst file (it should be in the same location as your .dck (input) file. If you find the file then you should be able to open it with a different editor (Wordpad, Notepad, Microsoft Word) since it is just a text file. If the .lst file doesn't exist anymore then please send me your project file and I will see if I can solve the problem. Kind regards, David Carmen VASILE wrote: Hello TRNSYS users, -- ----------------------------------------------------------- David BRADLEY Solar Energy Laboratory - University of Wisconsin, Madison 1500 Engineering Drive Madison, WI 53706 Ph: +1 608 263 1589 Fax: +1 608 262 8464 email: dbradley@engr.wisc.edu web: http://sel.me.wisc.edu ----------------------------------------------------------- |