nmTest({
  test_that("Issue nlmixr#502", {
    d_mask <-
      structure(list(
        ID = c(
          1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2,
          2, 2, 2, 2
        ), CMT = c(
          "TG", "CENTRAL", "CENTRAL", "CENTRAL", "CENTRAL",
          "CENTRAL", "CENTRAL", "CENTRAL", "CENTRAL", "CENTRAL", "CENTRAL",
          "CENTRAL", "TG", "CENTRAL", "TG", "TG", "TG"
        ), DVID = c(
          "TG",
          "cp", "cp", "cp", "cp", "cp", "cp", "cp", "cp", "cp", "cp", "cp",
          "TG", "cp", "TG", "TG", "TG"
        ), TIME = c(
          -672, 0, 1, 4, 8, 24,
          48, 168, 336, 672, 1008, 1680, -24, 2, 48, 336, 1008
        ), DV = c(
          1.23857621002093,
          1.61552201665003, 1.0918010859138, 1.55870992424631, 0.695699182924043,
          1.130515846091, 0.42153806881519, 1.63170301959007, 0.69480995799257,
          0.274105555786868, 0.474369348047014, 2.51318371567032, 2.11711507953987,
          0.0813858368249748, 0.0477902280089111, 1.00026583587068, 0.674341247526479
        ), MDV = c(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0),
        WEIGHT_BL = c(
          73.4, 73.4, 73.4, 73.4, 73.4, 73.4, 73.4, 73.4,
          73.4, 73.4, 73.4, 73.4, 95.5, 95.5, 95.5, 95.5, 95.5
        )
      ), row.names = c(
        NA,
        -17L
      ), class = c("data.frame"))

    nlmixr_threecmt_mm_no_add_wtcl_pdtg_kout_delay2 <- function() {
      ini({
        tf_sc <- log(999)
        tf_infilt <- log(999)
        tka_sc <- log(999)
        tka_infilt <- log(999)
        tcl_low <- log(999)
        tcl_high <- log(999)
        tcl_c50 <- log(3000)
        e_wt_cl <- fixed(999)
        tv <- log(999)
        tq1 <- log(999)
        tvp1 <- log(10)
        tq2 <- log(999)
        tvp2 <- log(20)
        eta_cl~999
        eta_v~999
        prop_err <- 999

        tg_bl <- log(999)
        eta_tg_bl~999
        tg_kel <- log(999)
        tg_ec50 <- log(5000)
        tg_emax_kel <- log(2)
        ktr_tg <- log(999)
        prop_err_tg <- 999
      })
      model({
        # PK setup
        f_sc <- exp(tf_sc)
        f_infilt <- exp(tf_infilt)
        ka_sc <- exp(tka_sc)
        ka_infilt <- exp(tka_infilt)
        cl_low <- exp(tcl_low + eta_cl)*(WEIGHT_BL/85)^e_wt_cl
        cl_high <- exp(tcl_high + eta_cl)*(WEIGHT_BL/85)^e_wt_cl
        cl_c50 <- exp(tcl_c50)
        v <- exp(tv + eta_v)
        q1 <- exp(tq1)
        vp1 <- exp(tvp1)
        q2 <- exp(tq2)
        vp2 <- exp(tvp2)

        # PK micro-parameters
        ke_low <- cl_low/v
        ke_high <- cl_high/v
        kc_p1 <- q1/v
        kp1_c <- q1/vp1
        kc_p2 <- q2/v
        kp2_c <- q2/vp2

        # TG setup
        tgbl <- exp(tg_bl + eta_tg_bl)
        kin_tg <- tgbl*exp(tg_kel)
        ktr_TG <- exp(ktr_tg)
        TG(0) <- tgbl

        # differential equations
        cp <- CENTRAL/v*1e3 # 1e3 is for unit conversion
        ke <- ke_low + (ke_high - ke_low)*cp/(cp + cl_c50)
        kout_tg <- exp(tg_kel) + exp(tg_emax_kel)*TG_TR/(TG_TR + exp(tg_ec50))
        d/dt(IVINFILT) =             - ka_infilt * IVINFILT
        d/dt(SC)       = -ka_sc * SC
        d/dt(CENTRAL)  =  ka_sc * SC + ka_infilt * IVINFILT - ke*CENTRAL - kc_p1*CENTRAL + kp1_c*P1 - kc_p2*CENTRAL + kp2_c*P2
        d/dt(P1) =                                                         kc_p1*CENTRAL - kp1_c*P1
        d/dt(P2) =                                                                                    kc_p2*CENTRAL - kp2_c*P2

        f(SC) <- f_sc
        f(IVINFILT) <- f_infilt

        # TG transit model
        d/dt(TG_TR) = ktr_tg*cp - ktr_tg*TG_TR
        d/dt(TG) = kin_tg - kout_tg*TG

        # Residual error models
        cp ~ prop(prop_err)
        TG ~ prop(prop_err_tg)
      })
    }

    expect_error(
      suppressWarnings(suppressMessages(nlmixr(
        object=nlmixr_threecmt_mm_no_add_wtcl_pdtg_kout_delay2,
        data=d_mask,
        est="saem",
        control=saemControl(print=0, nEm = 3, nBurn = 3)
      ))),
      NA
    )
  })
})