Hi there,
On Jun 15, 2009, at 4:12 AM, Torsten Dreyer wrote:
>> I've had another error message for the last few weeks while starting FG ,
>>
>>
>> Nasal runtime error: nil used in numeric context
>> at data/Nasal/startup.nas , line 12
I've encountered exactly the same problem.
I'm not so sure what it should look like, but at least it needs nil check for
the property.
Another solution can be setting 0 to the property at the beginning.
setprop("/environment/metar/base-wind-speed-kt", 0.0);
before set_runway_from_metar_wind() is called.
Melchior, what do you think is the better solution for this?
Tat
>>
>> so it looks like "environment/metar/base-wind-speed-kt" is still nil when
>> read the first time ...
>> I fixed it locally , but not sure who added it , so I'll leave it alone
>
> That's my fault for sure. This node is not initialized before a valid metar
> has been decoded. The boolean property /environment/metar/valid is true if
> the properties under /environment/metar are filled from a valid metar.
> So - if a valid metar has not (yet) been received from noaa, there is no
> wind-speed and no wind-range.
>
> Probably startup.nas should wait for /environment/metar/valid to become true
> before using the wind-speed and wind-range nodes.
>
> Maybe Melchior has a good idea how to do this?
>
> Torsten
>
>
>
>
>
>
>
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