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

> base::assign(".ptime", proc.time(), pos = "CheckExEnv")
> ### Name: derive_locf_records
> ### Title: Derive LOCF (Last Observation Carried Forward) Records
> ### Aliases: derive_locf_records
> ### Keywords: der_prm_bds_findings
> 
> ### ** Examples
> 
> 
> library(dplyr)

Attaching package: ‘dplyr’

The following object is masked from ‘package:admiral’:

    vars

The following objects are masked from ‘package:stats’:

    filter, lag

The following objects are masked from ‘package:base’:

    intersect, setdiff, setequal, union

> library(tibble)
> 
> advs <- tribble(
+   ~STUDYID,  ~USUBJID,      ~PARAMCD, ~PARAMN, ~AVAL, ~AVISITN, ~AVISIT,
+   "CDISC01", "01-701-1015", "PULSE",        1,    61,        0, "BASELINE",
+   "CDISC01", "01-701-1015", "PULSE",        1,    60,        2, "WEEK 6",
+   "CDISC01", "01-701-1015", "DIABP",        2,    51,        0, "BASELINE",
+   "CDISC01", "01-701-1015", "DIABP",        2,    50,        2, "WEEK 2",
+   "CDISC01", "01-701-1015", "DIABP",        2,    51,        4, "WEEK 4",
+   "CDISC01", "01-701-1015", "DIABP",        2,    50,        6, "WEEK 6",
+   "CDISC01", "01-701-1015", "SYSBP",        3,   121,        0, "BASELINE",
+   "CDISC01", "01-701-1015", "SYSBP",        3,   121,        2, "WEEK 2",
+   "CDISC01", "01-701-1015", "SYSBP",        3,   121,        4, "WEEK 4",
+   "CDISC01", "01-701-1015", "SYSBP",        3,   121,        6, "WEEK 6",
+   "CDISC01", "01-701-1028", "PULSE",        1,    65,        0, "BASELINE",
+   "CDISC01", "01-701-1028", "DIABP",        2,    79,        0, "BASELINE",
+   "CDISC01", "01-701-1028", "DIABP",        2,    80,        2, "WEEK 2",
+   "CDISC01", "01-701-1028", "DIABP",        2,    NA,        4, "WEEK 4",
+   "CDISC01", "01-701-1028", "DIABP",        2,    NA,        6, "WEEK 6",
+   "CDISC01", "01-701-1028", "SYSBP",        3,   130,        0, "BASELINE",
+   "CDISC01", "01-701-1028", "SYSBP",        3,   132,        2, "WEEK 2"
+ )
> 
> 
> # A dataset with all the combinations of PARAMCD, PARAM, AVISIT, AVISITN, ... which are expected.
> advs_expected_obsv <- tribble(
+   ~PARAMCD, ~AVISITN, ~AVISIT,
+   "PULSE",         0, "BASELINE",
+   "PULSE",         6, "WEEK 6",
+   "DIABP",         0, "BASELINE",
+   "DIABP",         2, "WEEK 2",
+   "DIABP",         4, "WEEK 4",
+   "DIABP",         6, "WEEK 6",
+   "SYSBP",         0, "BASELINE",
+   "SYSBP",         2, "WEEK 2",
+   "SYSBP",         4, "WEEK 4",
+   "SYSBP",         6, "WEEK 6"
+ )
> 
> derive_locf_records(
+   data = advs,
+   dataset_expected_obs = advs_expected_obsv,
+   by_vars = exprs(STUDYID, USUBJID, PARAMCD),
+   order = exprs(AVISITN, AVISIT),
+   keep_vars = exprs(PARAMN)
+ )
Error in vectbl_assign(x[[j]], i, recycled_value[[j]]) : 
  DLL requires the use of native symbols
Calls: derive_locf_records ... tbl_subassign_row -> withCallingHandlers -> vectbl_assign
Execution halted