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Running the tests in ‘tests/t-startingvalues-invBurr-family.R’ failed.
Complete output:
  > 
  > require(actuar)
  Loading required package: actuar
  
  Attaching package: 'actuar'
  
  The following objects are masked from 'package:stats':
  
      sd, var
  
  The following object is masked from 'package:grDevices':
  
      cm
  
  > require(fitdistrplus)
  Loading required package: fitdistrplus
  Loading required package: MASS
  Loading required package: survival
  > n <- 1e4
  > 
  > truescale <- 100
  > trueshape1 <- pi
  > 
  > if(FALSE)
  + {
  +   plot(ecdf(rburr(n, trueshape1, 2, scale=truescale)))
  +   lines(ecdf(1/rinvburr(n, trueshape1, 2, scale=1/truescale)), col="red")
  +   
  +   curve(pburr(x, trueshape1, 2, scale=truescale), from=0, to=5*truescale)
  +   curve(pinvburr(1/x, trueshape1, 2, scale=1/truescale, lower=FALSE), add=TRUE, col="red")
  + }
  > 
  > z <- rburr(n, trueshape1, 2, scale=truescale)
  > y <- 1/z
  > fit_y_IB <- fitdist(y, "invburr")
  > mytitle <- paste("fitted Inv. Burr", paste(signif(coef(fit_y_IB), 3), collapse= ", "))
  > myleg <- paste("theo. Inv. Burr", paste(signif(c(trueshape1, 2, 1/truescale), 3), collapse= ", "))
  > cdfcomp(fit_y_IB, xlogscale = TRUE, do.points = FALSE, addlegend = FALSE, main=mytitle)
  > curve(pinvburr(x, trueshape1, 2, scale=1/truescale), add=TRUE, col="green")
  > legend("topleft", lty=1, col=c("black", "red", "green"), 
  +        c("empirical", "fitted", myleg))
  > 
  > 
  > y <- rinvburr(n, trueshape1, 2, scale=1/truescale)
  > fit_y_IB <- fitdist(y, "invburr")
  Error in fitdist(y, "invburr") : 
    the function mle failed to estimate the parameters, 
                  with the error code 1
  Execution halted