Command 'orca' not found @win/processx.c:983

I want to export a plotly object to a static image using plotly::orca on Win10, but I'm a getting the following error:

<c_error in rethrow_call(c_processx_exec, command, c(command, args), stdin,  ...:
 Command 'orca' not found @win/processx.c:983 (processx_exec)>

The problem seems to be not orca itself but processx::run. I wrote my own little orca function using base::system instead which works just fine.

Here is the same issue.

    p <- plot_ly(mtcars, x = ~mpg, y = ~wt)
    
    ## Fails
    plotly::orca(p)

    ## Works
    file = "plot.png"; format = "png"
    debug=verbose=safe=F
    b <- plotly_build(p)
    plotlyjs <- plotly:::plotlyjsBundle(b)
    plotlyjs_path <- file.path(plotlyjs$src$file, plotlyjs$script)
    if (!is.null(plotlyjs$package)) {
      plotlyjs_path <- system.file(plotlyjs_path, package = plotlyjs$package)
    }
    tmp <- tempfile(fileext = ".json")
    cat(plotly:::to_JSON(b$x[c("data", "layout")]), file = tmp)
    args <- c("graph", tmp, "-o", file, "--format", 
              format, "--plotlyjs", plotlyjs_path, if (debug) "--debug", 
              if (verbose) "--verbose", if (safe) "--safe-mode")
    base::system(paste("orca", paste(args, collapse = " ")))

Reproduisez l’échec de Win10 avec plotly::orca(p) en utilisant l’exemple mtcars, puis examinez l’invocation de processx::run et comparez-la avec la commande base::system fonctionnelle présentée dans le rapport. C’est terminé lorsque plotly::orca peut exporter le graphique vers une image statique sous Windows sans l’erreur "Command 'orca' not found".