Hi, I have runned the program. There is no error showed up. Dt is 0.004.
As I mentioned above, the problem is because the windows in another PC using ',' instead of '.' as the decimal points, which generate files with dt = 0,00400, as well as the data. Therefore, the error shows up in this PC, because dt = 0,004 = 0.
There is one solution for this problem, change the settings in control panel/regional and language options, select Danish instead of English or others.
Well, this is not the best solution I hope.
So if you have any other suggestions?
Kiwi
