Running examples in ‘MADMMplasso-Ex.R’ failed
The error most likely occurred in:

> ### Name: MADMMplasso
> ### Title: MADMMplasso: Multi Variate Multi Response ADMM with Interaction
> ###   Effects
> ### Aliases: MADMMplasso-package MADMMplasso
> 
> ### ** Examples
> 
> # Train the model
> # generate some data
> set.seed(1235)
> N <- 100
> p <- 50
> nz <- 4
> K <- nz
> X <- matrix(rnorm(n = N * p), nrow = N, ncol = p)
> mx <- colMeans(X)
> sx <- sqrt(apply(X, 2, var))
> X <- scale(X, mx, sx)
> X <- matrix(as.numeric(X), N, p)
> Z <- matrix(rnorm(N * nz), N, nz)
> mz <- colMeans(Z)
> sz <- sqrt(apply(Z, 2, var))
> Z <- scale(Z, mz, sz)
> beta_1 <- rep(x = 0, times = p)
> beta_2 <- rep(x = 0, times = p)
> beta_3 <- rep(x = 0, times = p)
> beta_4 <- rep(x = 0, times = p)
> beta_5 <- rep(x = 0, times = p)
> beta_6 <- rep(x = 0, times = p)
> 
> beta_1[1:5] <- c(2, 2, 2, 2, 2)
> beta_2[1:5] <- c(2, 2, 2, 2, 2)
> beta_3[6:10] <- c(2, 2, 2, -2, -2)
> beta_4[6:10] <- c(2, 2, 2, -2, -2)
> beta_5[11:15] <- c(-2, -2, -2, -2, -2)
> beta_6[11:15] <- c(-2, -2, -2, -2, -2)
> 
> Beta <- cbind(beta_1, beta_2, beta_3, beta_4, beta_5, beta_6)
> colnames(Beta) <- 1:6
> 
> theta <- array(0, c(p, K, 6))
> theta[1, 1, 1] <- 2
> theta[3, 2, 1] <- 2
> theta[4, 3, 1] <- -2
> theta[5, 4, 1] <- -2
> theta[1, 1, 2] <- 2
> theta[3, 2, 2] <- 2
> theta[4, 3, 2] <- -2
> theta[5, 4, 2] <- -2
> theta[6, 1, 3] <- 2
> theta[8, 2, 3] <- 2
> theta[9, 3, 3] <- -2
> theta[10, 4, 3] <- -2
> theta[6, 1, 4] <- 2
> theta[8, 2, 4] <- 2
> theta[9, 3, 4] <- -2
> theta[10, 4, 4] <- -2
> theta[11, 1, 5] <- 2
> theta[13, 2, 5] <- 2
> theta[14, 3, 5] <- -2
> theta[15, 4, 5] <- -2
> theta[11, 1, 6] <- 2
> theta[13, 2, 6] <- 2
> theta[14, 3, 6] <- -2
> theta[15, 4, 6] <- -2
> 
> pliable <- matrix(0, N, 6)
> for (e in 1:6) {
+   pliable[, e] <- compute_pliable(X, Z, theta[, , e])
+ }
> 
> esd <- diag(6)
> e <- MASS::mvrnorm(N, mu = rep(0, 6), Sigma = esd)
> y_train <- X %*% Beta + pliable + e
> y <- y_train
> 
> colnames(y) <- c(paste0("y", seq_len(ncol(y))))
> TT <- tree_parms(y)
> plot(TT$h_clust)
> gg1 <- matrix(0, 2, 2)
> gg1[1, ] <- c(0.02, 0.02)
> gg1[2, ] <- c(0.02, 0.02)
> 
> nlambda <- 1
> e.abs <- 1E-4
> e.rel <- 1E-2
> alpha <- 0.2
> tol <- 1E-3
> fit <- MADMMplasso(
+   X, Z, y,
+   alpha = alpha, my_lambda = matrix(rep(0.2, ncol(y)), 1),
+   lambda_min = 0.001, max_it = 1000, e.abs = e.abs, e.rel = e.rel,
+   maxgrid = nlambda, nlambda = nlambda, rho = 5, tree = TT, my_print = FALSE,
+   alph = TRUE, gg = gg1, tol = tol, cl = 2L
+ )
Error in unserialize(socklist[[n]]) : error reading from connection
Calls: MADMMplasso ... recvOneData -> recvOneData.SOCKcluster -> unserialize
Execution halted