Invalid off-diagonal eta created with piping

[billdenney]

In the example below, (etad,etaf) exists but with only neta1 and not neta2. I think that the important part is pulling an eta from more than one block eta at the same time.

library(nlmixr2)
#> Loading required package: nlmixr2data

mod <- function() {
  ini({
    a <- 1
    b <- 2
    etaa + etab ~ c(3, 0.1, 4)
    c <- 5
    etac ~ 6
    d <- 7
    f <- 9
    etad + etaf ~ c(8, 0.2, 10)
  })
  model({
     g <- (a + etaa)/(b + etab)
     h <- (c + etac)
     i <- (d + etad)
     j <- f + etaf
  })
}

mod_new <-
  ini(
    nlmixr(mod),
    etab + etac + etad ~
      c(7,
        0.2, 8,
        0.3, 0.4, 9),
    etaa ~ 0
  )
#> ℹ some correlations may have been dropped for the variables: `etab`, `etac`, `etad`
#> ℹ the piping should specify the needed covariances directly
#> ℹ change initial estimate of `etab` to `7`
#> ℹ add covariance between `etac` and `etab` with initial estimate `0.2`
#> ℹ change initial estimate of `etac` to `8`
#> ℹ add covariance between `etad` and `etab` with initial estimate `0.3`
#> ℹ add covariance between `etad` and `etac` with initial estimate `0.4`
#> ℹ change initial estimate of `etad` to `9`
#> ℹ change initial estimate of `etaa` to `0`
mod_new$iniDf
#>    ntheta neta1 neta2        name lower  est upper   fix label backTransform
#> 1       1    NA    NA           a  -Inf  1.0   Inf FALSE  <NA>          <NA>
#> 2       2    NA    NA           b  -Inf  2.0   Inf FALSE  <NA>          <NA>
#> 3       3    NA    NA           c  -Inf  5.0   Inf FALSE  <NA>          <NA>
#> 4       4    NA    NA           d  -Inf  7.0   Inf FALSE  <NA>          <NA>
#> 5       5    NA    NA           f  -Inf  9.0   Inf FALSE  <NA>          <NA>
#> 6      NA     1     1        etaa  -Inf  0.0   Inf FALSE  <NA>          <NA>
#> 11     NA     2    NA (etad,etaf)  -Inf  0.2   Inf FALSE  <NA>          <NA>
#> 12     NA     2     2        etaf  -Inf 10.0   Inf FALSE  <NA>          <NA>
#> 8      NA     3     3        etab  -Inf  7.0   Inf FALSE  <NA>          <NA>
#> 9      NA     4     4        etac  -Inf  8.0   Inf FALSE  <NA>          <NA>
#> 10     NA     5     5        etad  -Inf  9.0   Inf FALSE  <NA>          <NA>
#> 13     NA     4     3 (etab,etac)  -Inf  0.2   Inf FALSE  <NA>          <NA>
#> 14     NA     5     3 (etab,etad)  -Inf  0.3   Inf FALSE  <NA>          <NA>
#> 15     NA     5     4 (etac,etad)  -Inf  0.4   Inf FALSE  <NA>          <NA>
#>    condition  err
#> 1       <NA> <NA>
#> 2       <NA> <NA>
#> 3       <NA> <NA>
#> 4       <NA> <NA>
#> 5       <NA> <NA>
#> 6         id <NA>
#> 11        id <NA>
#> 12        id <NA>
#> 8         id <NA>
#> 9         id <NA>
#> 10        id <NA>
#> 13        id <NA>
#> 14        id <NA>
#> 15        id <NA>

^{Created on 2023-05-04 with reprex v2.0.2}

[billdenney]

When I found this issue, I also had #481 in the same problem. They could be related.