R Under development (unstable) (2024-12-01 r87412 ucrt) -- "Unsuffered Consequences"
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> # This file is part of the standard setup for testthat.
> # It is recommended that you do not modify it.
> #
> # Where should you do additional test configuration?
> # Learn more about the roles of various files in:
> # * https://r-pkgs.org/testing-design.html#sec-tests-files-overview
> # * https://testthat.r-lib.org/articles/special-files.html
> 
> library(testthat)
> library(GDILM.SEIRS)
> 
> test_check("GDILM.SEIRS")
[ FAIL 1 | WARN 0 | SKIP 1 | PASS 0 ]

══ Skipped tests (1) ═══════════════════════════════════════════════════════════
• empty test (1): 'test-GDILM_SEIRS_Sim_Par_Est.R:1:1'

══ Failed tests ════════════════════════════════════════════════════════════════
── Error ('test-GDILM_SEIRS_Par_Est.R:4:1'): An example for a real data model fitting ──
Error in `solve.default(tau1^2 * (as.numeric(lambda1) * D + (1 - as.numeric(lambda1)) * 
    I))`: system is computationally singular: reciprocal condition number = 7.20799e-17
Backtrace:
    ▆
 1. └─GDILM.SEIRS::GDILM_SEIRS_Par_Est(...) at test-GDILM_SEIRS_Par_Est.R:4:1
 2.   └─GDILM.SEIRS (local) estfun(...)
 3.     └─stats::optim(init, Loglik1)
 4.       └─stats (local) `<fn>`(`<dbl>`)
 5.         └─GDILM.SEIRS (local) fn(par, ...)
 6.           ├─mvtnorm::dmvnorm(...)
 7.           │ └─base::ncol(sigma)
 8.           ├─base::solve(...)
 9.           └─base::solve.default(...)

[ FAIL 1 | WARN 0 | SKIP 1 | PASS 0 ]
Error: Test failures
Execution halted