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: table.SFM
  > ### Title: Single Factor Asset-Pricing Model Summary: Statistics and
  > ###   Stylized Facts
  > ### Aliases: table.SFM table.CAPM
  > 
  > ### ** Examples
  > 
  > 
  > data(managers)
  > table.SFM(managers[,1:3], managers[,8], Rf = managers[,10])
  Error in .coefficients(xRa[, n[1]], xRb[, n[2]], subset, method = method,  : 
    "package:RobStatTM" %in% search() || requireNamespace("RobStatTM",  .... is not TRUE
  Calls: table.SFM ... SFM.coefficients -> apply -> FUN -> .coefficients -> stopifnot
  Execution halted