I have an old .wtg file for an ecotechnia WTG which will not load into a project in WAsP 12.4. It opens in turbine editor ok, but will not save (error message fWindTurbineType_WTGPerfomr Table_File Access_1.AssignTo RveaWTGPerformTable:Could not append data point.) I have tried making a new .wtg file using the data, and that does not work either. But I cannot see any difference between this file and other .WTG files, that do work.