On Mon, 2007-09-10 at 16:58 -0700, Robert Fu wrote:
> Hi,
>
> I'm new to FlightGrear and this mail list. The pre-built and
> self-built FlightGear-0.9.11-pre1 worked in my environment: MinGW/MSYS
> on Windows XP. But for build of the lastest CVS code of FlightGear and
> SimGear, I got the following error:
>
> C:\>fgfs --aircraft=f16 --airport-id=KJFK
> Model Author: Erik Hofman
> Creation Date: 2001-01-01
> Version: $Revision: 1.44 $
> Description: Models an F-16A Block-32 (Basic US configuration)
> Nasal runtime error: non-scalar in string context
> at
> C:/gnu/msys/1.0.11/local/src/FlightGear-0.9/data/Nasal/aircraft.nas,
> line 395
> called from:
> C:/gnu/msys/1.0.11/local/src/FlightGear-0.9/data/Nasal/aircraft.nas,
> line 818
> Nasal runtime error: non-scalar in string context
> at
> C:/gnu/msys/1.0.11/local/src/FlightGear-0.9/data/Nasal/globals.nas,
> line 118
>
> The splash screen showed:
> reading airport & navaigation data
> ......
> loading aircraft
> initializing subsystems
>
> then a Windows error dialog appeared and the fgfs application was
> closed.
>
> Line 395 and 818 of aircraft.nas are:
>
> me.path = getprop("/sim/fg-home") ~ "/aircraft-data/" ~
> getprop("/sim/aircraft") ~ ".xml";
>
> data.init();
>
> Line 118 of globals.nas is:
>
> var path = getprop("/sim/fg-home") ~ "/Nasal";
>
> It seems that the problem is in the function getprop. I guess getprop
> is a core API, so something may be fundamentally wrong in my setup.
> I'll list some details at the end of this email. BTW, I got the same
> error in Windows Vista.
>
> Did anyone encountered similar error before? May someone please advice
> on how to locate the problem area and resolve this issue?
>
> Thanks a lot,
> Robert Fu
>
Robert,
The common thread I am seeing is the prop /sim/fg-home. This is
supposed to point to a user place to store persistant data. Under linux
its /home/(user)/.fgfs. Under windows it should be something like the
path to "My Documents".
Assuming you can fire up fgfs without choosing an aircraft, look in the
property browser and see if /sim/fg-home is set, and set to something
sensible, (that is to say a writable directory).
Good luck,
Ron
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