RunModel_CemaNeige <- function(InputsModel, RunOptions, Param) {
  
  
  NParam <- 2L
  FortranOutputsCemaNeige <- c("Pliq", "Psol",
                               "SnowPack", "ThermalState", "Gratio",
                               "PotMelt", "Melt", "PliqAndMelt", "Temp")
  
  
  
  ## Arguments_check
  if (!inherits(InputsModel, "InputsModel")) {
    stop("'InputsModel' must be of class 'InputsModel'")
    return(NULL)
  }
  if (!inherits(InputsModel, "daily")) {
    stop("'InputsModel' must be of class 'daily'")
    return(NULL)
  }
  if (!inherits(InputsModel, "CemaNeige")) {
    stop("'InputsModel' must be of class 'CemaNeige'")
    return(NULL)
  }
  if (!inherits(RunOptions, "RunOptions")) {
    stop("'RunOptions' must be of class 'RunOptions'")
    return(NULL)
  }
  if (!inherits(RunOptions, "CemaNeige")) {
    stop("'RunOptions' must be of class 'CemaNeige'")
    return(NULL)
  }
  if (!is.vector(Param) | !is.numeric(Param)) {
    stop("'Param' must be a numeric vector")
    return(NULL)
  }
  if (sum(!is.na(Param)) != NParam) {
    stop(sprintf("'Param' must be a vector of length %i and contain no NA", NParam))
    return(NULL)
  }
  
  ## Input_data_preparation
  if (identical(RunOptions$IndPeriod_WarmUp, 0)) {
    RunOptions$IndPeriod_WarmUp <- NULL
  }
  IndPeriod1     <- c(RunOptions$IndPeriod_WarmUp, RunOptions$IndPeriod_Run)
  IndPeriod2     <- (length(RunOptions$IndPeriod_WarmUp) + 1):length(IndPeriod1)
  ExportDatesR   <- "DatesR"   %in% RunOptions$Outputs_Sim
  ExportStateEnd <- "StateEnd" %in% RunOptions$Outputs_Sim
  

  
  
  
  ## SNOW_MODULE________________________________________________________________________________
  ParamCemaNeige <- Param
  NLayers        <- length(InputsModel$LayerPrecip)
  
  if (sum(is.na(ParamCemaNeige)) != 0) {
    stop("Param contains missing values")
    return(NULL)
  }
  if ("all" %in% RunOptions$Outputs_Sim) {
    IndOutputsCemaNeige <- 1:length(FortranOutputsCemaNeige)
    
  } else {
    IndOutputsCemaNeige <- which(FortranOutputsCemaNeige %in% RunOptions$Outputs_Sim)
  }
  
  CemaNeigeLayers     <- list()
  CemaNeigeStateEnd   <- NULL
  NameCemaNeigeLayers <- "CemaNeigeLayers"
  
  
  ## Call_DLL_CemaNeige_________________________
  for (iLayer in 1:NLayers) {
    StateStartCemaNeige <- RunOptions$IniStates[(7 + 20 + 40) + c(iLayer, iLayer + NLayers)]
    RESULTS <- .Fortran("frun_CemaNeige", PACKAGE = "airGR",
                        ## inputs
                        LInputs = as.integer(length(IndPeriod1)),                                       ### length of input and output series
                        InputsPrecip = InputsModel$LayerPrecip[[iLayer]][IndPeriod1],                   ### input series of total precipitation [mm/d]
                        InputsFracSolidPrecip = InputsModel$LayerFracSolidPrecip[[iLayer]][IndPeriod1], ### input series of fraction of solid precipitation [0-1]
                        InputsTemp = InputsModel$LayerTemp[[iLayer]][IndPeriod1],                       ### input series of air mean temperature [degC]
                        MeanAnSolidPrecip = RunOptions$MeanAnSolidPrecip[iLayer],                       ### value of annual mean solid precip [mm/y]
                        NParam = as.integer(2),                                                         ### number of model parameter = 2
                        Param = as.double(ParamCemaNeige),                                              ### parameter set
                        NStates = as.integer(2),                                                        ### number of state variables used for model initialising = 2
                        StateStart = StateStartCemaNeige,                                               ### state variables used when the model run starts
                        NOutputs = as.integer(length(IndOutputsCemaNeige)),                             ### number of output series
                        IndOutputs = IndOutputsCemaNeige,                                               ### indices of output series
                        ## outputs
                        Outputs = matrix(-999.999,                                                      ### output series [mm]
                                         nrow = length(IndPeriod1),
                                         ncol = length(IndOutputsCemaNeige)),
                        StateEnd = rep(-999.999, 2)                                                     ### state variables at the end of the model run (reservoir levels [mm] and HU)
    )
    RESULTS$Outputs[round(RESULTS$Outputs  , 3) == (-999.999)] <- NA
    RESULTS$StateEnd[round(RESULTS$StateEnd, 3) == (-999.999)] <- NA
    
    
    
    
    ## Data_storage
    CemaNeigeLayers[[iLayer]] <- lapply(seq_len(RESULTS$NOutputs), function(i) RESULTS$Outputs[IndPeriod2, i])
    names(CemaNeigeLayers[[iLayer]]) <- FortranOutputsCemaNeige[IndOutputsCemaNeige]
    if (ExportStateEnd) {
      CemaNeigeStateEnd <- c(CemaNeigeStateEnd, RESULTS$StateEnd)
    }
    rm(RESULTS)
    
  } ### ENDFOR_iLayer
  
  names(CemaNeigeLayers) <- paste("Layer", formatC(1:NLayers, width = 2, flag = "0"), sep = "")
  
  if (ExportStateEnd) { 
    CemaNeigeStateEnd <- CreateIniStates(FUN_MOD = RunModel_CemaNeige, InputsModel = InputsModel,
                                         ProdStore = NULL, RoutStore = NULL, ExpStore = NULL,
                                         UH1 = NULL, UH2 = NULL,
                                         GCemaNeigeLayers   = CemaNeigeStateEnd[seq_len(2*NLayers)[seq_len(2*NLayers) %% 2 == 1]],
                                         eTGCemaNeigeLayers = CemaNeigeStateEnd[seq_len(2*NLayers)[seq_len(2*NLayers) %% 2 == 0]],
                                         verbose = FALSE)
  }
  
  ## Output_data_preparation
  if (!ExportDatesR & !ExportStateEnd) {
    OutputsModel <- list(CemaNeigeLayers)
    names(OutputsModel) <- NameCemaNeigeLayers
  }
  if (ExportDatesR & !ExportStateEnd) {
    OutputsModel <- c(list(InputsModel$DatesR[RunOptions$IndPeriod_Run]),
                      list(CemaNeigeLayers))
    names(OutputsModel) <- c("DatesR", NameCemaNeigeLayers)
  }
  if (!ExportDatesR & ExportStateEnd) {
    OutputsModel <- c(list(CemaNeigeLayers),
                      list(CemaNeigeStateEnd))
    names(OutputsModel) <- c(NameCemaNeigeLayers, "StateEnd")
  }
  if (ExportDatesR & ExportStateEnd) {
    OutputsModel <- c(list(InputsModel$DatesR[RunOptions$IndPeriod_Run]),
                      list(CemaNeigeLayers),
                      list(CemaNeigeStateEnd))
    names(OutputsModel) <- c("DatesR", NameCemaNeigeLayers, "StateEnd")
  }
  
  
  ## End
  class(OutputsModel) <- c("OutputsModel", "daily", "CemaNeige")
  return(OutputsModel)
}