• using R version 4.5.2 Patched (2026-01-31 r89382)
• using platform: aarch64-apple-darwin20
• R was compiled by     Apple clang version 16.0.0 (clang-1600.0.26.6)     GNU Fortran (GCC) 14.2.0
• running under: macOS Ventura 13.7.8
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• checking for file ‘pcreg/DESCRIPTION’ ... OK
• checking extension type ... Package
• this is package ‘pcreg’ version ‘0.1.0’
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• checking examples ... [1s/1s] ERROR Running examples in ‘pcreg-Ex.R’ failed The error most likely occurred in: > ### Name: robust_pcreg > ### Title: Robust Principal Component Regression (Robust PCR) > ### Aliases: robust_pcreg > > ### ** Examples > > data(mtcars) > Result <- robust_pcreg(mtcars, y = "mpg") Warning in robustbase::covMcd(X) :   The covariance matrix has become singular during the iterations of the MCD algorithm. There are 0 observations (in the entire dataset of 32 obs.) lying on the hyperplane with equation a_1*(x_i1 - m_1) + ... + a_p*(x_ip - m_p) = 0 with (m_1, ..., m_p) the mean of these observations and coefficients a_i from the vector a <- c(-0.3333333, 0, 0, 0, 0, 0, -0.6666667, -0.6666667, 0, 0) Error in eigen(mcd$cov, symmetric = TRUE) :   infinite or missing values in 'x' Calls: robust_pcreg -> eigen Execution halted
• checking PDF version of manual ... [2s/2s] OK
• DONE Status: 1 ERROR
• using check arguments '--no-clean-on-error '