[R-pkg-devel] S4 methods

Gábor Csárdi c@@rd|@g@bor @end|ng |rom gm@||@com
Tue Jun 2 12:28:12 CEST 2020

You export these S4 classes from your package:

But these are not actually S4 classes, AFAICT. Remove the
`@exportClass` tags here:


On Tue, Jun 2, 2020 at 10:57 AM Edgar Josymar Torrejón-Magallanes
<ejosymart using gmail.com> wrote:
> Dear members
> I just finished some minor updates to an R package (sizeMat) I've had on
> CRAN (haven't had to update in a month). My package passes Check on my
> local machine, but it just bounced back from CRAN with the message
> Warning: S4 exports specified in 'NAMESPACE' but not defined in package
> 'sizeMat'
> I use roxygen2 to build my package NAMESPACE and don't have any S4 exports
> that I'm aware of.
> Perhaps this might be related to changes in R version 4.0.0?
> How could I fix this problem?
> Thanks.
> --
> Edgar Josymar Torrejón Magallanes
>         [[alternative HTML version deleted]]
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