Package check result: ERROR

Check: examples, Result: ERROR
  Running examples in ‘PerformanceAnalytics-Ex.R’ failed
  The error most likely occurred in:
  
  > base::assign(".ptime", proc.time(), pos = "CheckExEnv")
  > ### Name: chart.SFM
  > ### Title: Compare SFM estimated using robust estimators with that
  > ###   estimated by OLS
  > ### Aliases: chart.SFM
  > 
  > ### ** Examples
  > 
  >    data(managers)
  >    
  > 		mgrs <- managers["2002/"]  # So that all have managers have complete history
  >    names(mgrs)[7:10] <- c("LSEQ","SP500","Bond10Yr","RF") # Short names for last 3
  >    plot.zoo(mgrs)
  >    
  >    chart.SFM(mgrs$HAM1, mgrs$SP500, Rf=mgrs$RF)	
  Error in .coefficients(xRa[, n[1]], xRb[, n[2]], subset, method = method,  : 
    "package:RobStatTM" %in% search() || requireNamespace("RobStatTM",  .... is not TRUE
  Calls: chart.SFM ... SFM.coefficients -> apply -> FUN -> .coefficients -> stopifnot
  Execution halted