Registration problems:
  symbol ‘`_meteoland_PenmanPETPointsDay`’ not in namespace:
   .Call(`_meteoland_PenmanPETPointsDay`, latrad, elevation, slorad, 
       asprad, J, Tmin, Tmax, RHmin, RHmax, R_s, u, z, z0, alpha, 
       windfun)
  symbol ‘`_meteoland_aspect`’ not in namespace:
   .Call(`_meteoland_aspect`, data, nrows, ncols, cellWidth, cellHeight)
  symbol ‘`_meteoland_dailyEquilibriumPET`’ not in namespace:
   .Call(`_meteoland_dailyEquilibriumPET`, Temp, Rn)
  symbol ‘`_meteoland_dewpointTemperatureFromRH`’ not in namespace:
   .Call(`_meteoland_dewpointTemperatureFromRH`, T, RH)
  symbol ‘`_meteoland_getWindFieldIndexAndFactor`’ not in namespace:
   .Call(`_meteoland_getWindFieldIndexAndFactor`, windSpeed, windDirection, 
       wfSpeed, wfDirection)
  symbol ‘`_meteoland_interpolatePrecipitationEventSeriesPoints`’ not in namespace:
   .Call(`_meteoland_interpolatePrecipitationEventSeriesPoints`, 
       Xp, Yp, Zp, X, Y, Z, Pevent, iniRp, alpha, N, iterations, 
       popcrit)
  symbol ‘`_meteoland_interpolatePrecipitationSeriesPoints`’ not in namespace:
   .Call(`_meteoland_interpolatePrecipitationSeriesPoints`, Xp, 
       Yp, Zp, X, Y, Z, P, Psmooth, iniRp, alpha_event, alpha_amount, 
       N_event, N_amount, iterations, popcrit, fmax)
  symbol ‘`_meteoland_interpolateTdewSeriesPoints`’ not in namespace:
   .Call(`_meteoland_interpolateTdewSeriesPoints`, Xp, Yp, Zp, X, 
       Y, Z, T, iniRp, alpha, N, iterations)
  symbol ‘`_meteoland_interpolateTemperatureSeriesPoints`’ not in namespace:
   .Call(`_meteoland_interpolateTemperatureSeriesPoints`, Xp, Yp, 
       Zp, X, Y, Z, T, iniRp, alpha, N, iterations)
  symbol ‘`_meteoland_interpolateWindFieldSeriesPoints`’ not in namespace:
   .Call(`_meteoland_interpolateWindFieldSeriesPoints`, Xp, Yp, 
       WS, WD, X, Y, I, F, iniRp, alpha, N, iterations)
  symbol ‘`_meteoland_interpolateWindStationSeriesPoints`’ not in namespace:
   .Call(`_meteoland_interpolateWindStationSeriesPoints`, Xp, Yp, 
       WS, WD, X, Y, iniRp, alpha, N, iterations)
  symbol ‘`_meteoland_meteo`’ not in namespace:
   .Call(`_meteoland_meteo`, MeteoMonth, landscapeRainfall, ERconv, 
       ERsyn, shape, scale, albedo, firstMonth, cyclic)
  symbol ‘`_meteoland_PenmanMonteithPETPointSeries`’ not in namespace:
   .Call(`_meteoland_PenmanMonteithPETPointSeries`, rc, elevation, 
       Tmin, Tmax, RHmin, RHmax, Rn, u)
  symbol ‘`_meteoland_PenmanPETPointSeries`’ not in namespace:
   .Call(`_meteoland_PenmanPETPointSeries`, latrad, elevation, slorad, 
       asprad, J, Tmin, Tmax, RHmin, RHmax, R_s, u, z, z0, alpha, 
       windfun)
  symbol ‘`_meteoland_potentialRadiationPoints`’ not in namespace:
   .Call(`_meteoland_potentialRadiationPoints`, latrad, slorad, 
       asprad, J)
  symbol ‘`_meteoland_potentialRadiationSeries`’ not in namespace:
   .Call(`_meteoland_potentialRadiationSeries`, latrad, slorad, 
       asprad, J)
  symbol ‘`_meteoland_pseudoRainfall`’ not in namespace:
   .Call(`_meteoland_pseudoRainfall`, RainM, daysMonthAll, shape, 
       scale, firstMonth)
  symbol ‘`_meteoland_radiationPoints`’ not in namespace:
   .Call(`_meteoland_radiationPoints`, latrad, elevation, slorad, 
       asprad, J, diffTemp, diffTempMonth, VP, P)
  symbol ‘`_meteoland_radiationSeries`’ not in namespace:
   .Call(`_meteoland_radiationSeries`, latrad, elevation, slorad, 
       asprad, J, diffTemp, diffTempMonth, VP, P)
  symbol ‘`_meteoland_relativeHumidityFromDewpointTemp`’ not in namespace:
   .Call(`_meteoland_relativeHumidityFromDewpointTemp`, T, TD)
  symbol ‘`_meteoland_relativeHumidityFromMinMaxTemp`’ not in namespace:
   .Call(`_meteoland_relativeHumidityFromMinMaxTemp`, Tmin, Tmax)
  symbol ‘`_meteoland_slope`’ not in namespace:
   .Call(`_meteoland_slope`, data, nrows, ncols, cellWidth, cellHeight)
  symbol ‘`_meteoland_temp2SVP`’ not in namespace:
   .Call(`_meteoland_temp2SVP`, TD)
  symbol ‘`_meteoland_temporalSmoothing`’ not in namespace:
   .Call(`_meteoland_temporalSmoothing`, input, numDays, prec)
  symbol ‘`_meteoland_vapourPressureFromRH`’ not in namespace:
   .Call(`_meteoland_vapourPressureFromRH`, T, RH)
  symbol ‘`_meteoland_PenmanPET`’ not in namespace:
   .Call(`_meteoland_PenmanPET`, latrad, elevation, slorad, asprad, 
       J, Tmin, Tmax, RHmin, RHmax, R_s, u, z, z0, alpha, windfun)
  symbol ‘`_meteoland_PenmanMonteithPET`’ not in namespace:
   .Call(`_meteoland_PenmanMonteithPET`, rc, elevation, Tmin, Tmax, 
       RHmin, RHmax, Rn, u)
  symbol ‘`_meteoland_dateStringToJulianDays`’ not in namespace:
   .Call(`_meteoland_dateStringToJulianDays`, dateStrings)
  symbol ‘`_meteoland_daylength`’ not in namespace:
   .Call(`_meteoland_daylength`, latrad, slorad, asprad, delta)
  symbol ‘`_meteoland_daylengthseconds`’ not in namespace:
   .Call(`_meteoland_daylengthseconds`, latrad, slorad, asprad, 
       delta)
  symbol ‘`_meteoland_directDiffuseDay`’ not in namespace:
   .Call(`_meteoland_directDiffuseDay`, solarConstant, latrad, slorad, 
       asprad, delta, R_s, clearday, nsteps)
  symbol ‘`_meteoland_directDiffuseInstant`’ not in namespace:
   .Call(`_meteoland_directDiffuseInstant`, solarConstant, latrad, 
       slorad, asprad, delta, hrad, R_p, R_s, clearday)
  symbol ‘`_meteoland_julianDay`’ not in namespace:
   .Call(`_meteoland_julianDay`, year, month, day)
  symbol ‘`_meteoland_netRadiation`’ not in namespace:
   .Call(`_meteoland_netRadiation`, solarConstant, latrad, elevation, 
       slorad, asprad, delta, vpa, tmin, tmax, R_s, alpha)
  symbol ‘`_meteoland_outgoingLongwaveRadiation`’ not in namespace:
   .Call(`_meteoland_outgoingLongwaveRadiation`, solarConstant, 
       latrad, elevation, slorad, asprad, delta, vpa, tmin, tmax, 
       R_s)
  symbol ‘`_meteoland_RpotDay`’ not in namespace:
   .Call(`_meteoland_RpotDay`, solarConstant, latrad, slorad, asprad, 
       delta)
  symbol ‘`_meteoland_solarConstant`’ not in namespace:
   .Call(`_meteoland_solarConstant`, J)
  symbol ‘`_meteoland_solarDeclination`’ not in namespace:
   .Call(`_meteoland_solarDeclination`, J)
  symbol ‘`_meteoland_solarElevation`’ not in namespace:
   .Call(`_meteoland_solarElevation`, latrad, delta, hrad)
  symbol ‘`_meteoland_RDay`’ not in namespace:
   .Call(`_meteoland_RDay`, solarConstant, latrad, elevation, slorad, 
       asprad, delta, diffTemp, diffTempMonth, vpa, precipitation)
  symbol ‘`_meteoland_sunRiseSet`’ not in namespace:
   .Call(`_meteoland_sunRiseSet`, latrad, slorad, asprad, delta)
  symbol ‘`_meteoland_airDensity`’ not in namespace:
   .Call(`_meteoland_airDensity`, temperature, Patm)
  symbol ‘`_meteoland_atmosphericPressure`’ not in namespace:
   .Call(`_meteoland_atmosphericPressure`, elevation)
  symbol ‘`_meteoland_averageDailyVapourPressure`’ not in namespace:
   .Call(`_meteoland_averageDailyVapourPressure`, Tmin, Tmax, RHmin, 
       RHmax)
  symbol ‘`_meteoland_averageDaylightTemperature`’ not in namespace:
   .Call(`_meteoland_averageDaylightTemperature`, Tmin, Tmax)
  symbol ‘`_meteoland_latentHeatVaporisation`’ not in namespace:
   .Call(`_meteoland_latentHeatVaporisation`, temperature)
  symbol ‘`_meteoland_latentHeatVaporisationMol`’ not in namespace:
   .Call(`_meteoland_latentHeatVaporisationMol`, temperature)
  symbol ‘`_meteoland_psychrometricConstant`’ not in namespace:
   .Call(`_meteoland_psychrometricConstant`, temperature, Patm)
  symbol ‘`_meteoland_saturationVapourPressure`’ not in namespace:
   .Call(`_meteoland_saturationVapourPressure`, temperature)
  symbol ‘`_meteoland_saturationVaporPressureCurveSlope`’ not in namespace:
   .Call(`_meteoland_saturationVaporPressureCurveSlope`, temperature)
See chapter ‘System and foreign language interfaces’ in the ‘Writing R
Extensions’ manual.