Nasal runtime errors

[IskenderWang]

There is some very old code in question, and I don't know Nasal very well, so I thought it would be best to leave this here for someone more knowledgeable to have a look and see if they could come up with a solution:

  126.08 [ALRT]:nasal     C:\Jenkins\workspace\Windows-nightly\flightgear\src\Scripting\NasalSys.cxx:1467: Nasal runtime error: undefined symbol: dual_control_tools
  126.08 [ALRT]:nasal     C:\Jenkins\workspace\Windows-nightly\flightgear\src\Scripting\NasalSys.cxx:1483:   at C:/Users/IskenderWang/FlightGear/Custom Aircraft/Aircraft/787-family/DualControl/DualControl_base.nas, line 9

  160.62 [ALRT]:nasal     C:\Jenkins\workspace\Windows-nightly\flightgear\src\Scripting\NasalSys.cxx:1467: Nasal runtime error: nil used in numeric context
  160.62 [ALRT]:nasal     C:\Jenkins\workspace\Windows-nightly\flightgear\src\Scripting\NasalSys.cxx:1483:   at C:/Users/IskenderWang/FlightGear/Custom Aircraft/Aircraft/787-family/Nasal/brakesystem.nas, line 79

One of them appears to be a variable name that has no definition or meaning (at least not anymore), and in the other it tries to do math on a yasim property for gross weight, which doesn't work as it turns out and a JSBsim solution would be preferable anyways. Any suggestions welcome :)