* using log directory ‘/Users/ripley/R/packages/tests-devel/calculus.Rcheck’
* using R Under development (unstable) (2026-08-22 r90443)
* using platform: aarch64-apple-darwin25.6.0
* R was compiled by
    Apple clang version 21.0.0 (clang-2100.1.1.101)
    GNU Fortran (GCC) 14.2.0
* running under: macOS Tahoe 26.6.2
* using session charset: UTF-8
* current time: 2026-08-24 06:43:56 UTC
* using option ‘--no-stop-on-test-error’
* checking for file ‘calculus/DESCRIPTION’ ... OK
* checking extension type ... Package
* this is package ‘calculus’ version ‘1.1.0’
* checking package namespace information ... OK
* checking package dependencies ... OK
* checking if this is a source package ... OK
* checking if there is a namespace ... OK
* checking for executable files ... OK
* checking for hidden files and directories ... OK
* checking for portable file names ... OK
* checking for sufficient/correct file permissions ... OK
* checking whether package ‘calculus’ can be installed ... OK
* used C++ compiler: ‘Apple clang version 21.0.0 (clang-2100.1.1.101)’
* used SDK: ‘MacOSX26.5.sdk’
* checking installed package size ... OK
* checking package directory ... OK
* checking ‘build’ directory ... OK
* checking DESCRIPTION meta-information ... OK
* checking top-level files ... OK
* checking for left-over files ... OK
* checking index information ... OK
* checking package subdirectories ... OK
* checking code files for non-ASCII characters ... OK
* checking R files for syntax errors ... OK
* checking whether the package can be loaded ... OK
* checking whether the package can be loaded with stated dependencies ... OK
* checking whether the package can be unloaded cleanly ... OK
* checking whether the namespace can be loaded with stated dependencies ... OK
* checking whether the namespace can be unloaded cleanly ... OK
* checking loading without being on the library search path ... OK
* checking use of S3 registration ... OK
* checking dependencies in R code ... OK
* checking S3 generic/method consistency ... OK
* checking replacement functions ... OK
* checking foreign function calls ... OK
* checking R code for possible problems ... OK
* checking Rd files ... OK
* checking Rd metadata ... OK
* checking Rd cross-references ... OK
* checking for missing documentation entries ... OK
* checking for code/documentation mismatches ... OK
* checking Rd \usage sections ... OK
* checking Rd contents ... OK
* checking for unstated dependencies in examples ... OK
* checking line endings in C/C++/Fortran sources/headers ... OK
* checking pragmas in C/C++ headers and code ... OK
* checking compilation flags used ... OK
* checking compiled code ... OK
* checking installed files from ‘inst/doc’ ... OK
* checking files in ‘vignettes’ ... OK
* checking examples ... ERROR
Running examples in ‘calculus-Ex.R’ failed
The error most likely occurred in:

> ### Name: einstein
> ### Title: Numerical and Symbolic Einstein Summation
> ### Aliases: einstein
> 
> ### ** Examples
> 
> ### A{i,j} B{j,k}
> a <- array(letters[1:6], dim = c(i=2, j=3))
> b <- array(letters[1:3], dim = c(j=3, k=1))
> einstein(a,b)
     [,1]                               
[1,] "(a) * (a) + (c) * (b) + (e) * (c)"
[2,] "(b) * (a) + (d) * (b) + (f) * (c)"
> 
> ### A{i,j} B{j,k,k} C{k,l} D{j,k}
> a <- array(1:10, dim = c(i=2, j=5))
> b <- array(1:45, dim = c(j=5, k=3, k=3))
> c <- array(1:12, dim = c(k=3, l=4))
> d <- array(1:15, dim = c(j=5, k=3))
> einstein(a,b,c,d)
Error in einstein(a, b, c, d) : 
  no index found: use 'index(x) <- ...' to set summation indices
Execution halted
* checking for unstated dependencies in ‘tests’ ... OK
* checking tests ...
  Running ‘testthat.R’ [13s/13s]
 [13s/13s] OK
* checking for unstated dependencies in vignettes ... OK
* checking package vignettes ... OK
* checking re-building of vignette outputs ... OK
* checking PDF version of manual ... OK
* checking HTML version of manual ... OK
* checking for detritus in the temp directory ... OK
* DONE

Status: 1 ERROR
See
  ‘/Users/ripley/R/packages/tests-devel/calculus.Rcheck/00check.log’
for details.

       51.55 real        39.07 user         9.54 sys