Dear, I re-post my problem of how to insert a local measured turbulence intensity data file ? When I try to insert a turbulence intensity file consisting of mean TI and stdev on TI, in the format as described in the WAT help menu (TXT or Excel file), I always receive the following message: "EZeroDivide occured in WAT 'RadioGroup10Click' routine while calculate reference turbine site Exeption message=Floating point division by zero" I remember that I read a post on this forum stating that the project options should be changed, but this has no effect on my problem. I am really looking forward to a quick response since I received no reaction on my previous post dating end of December 2013 and since any help support for WEng or WAT is really lacking: I did not receive an absolutely necessary user manual for both applications, and contacting the WAsP Team for any support doesn't get answered. Has anyone a telephone number from the WAsP Team ? Looking forward and hoping that I can start using the software for what I bought it. Thanks in advance, Yves