From b883e6075bd76f979fbffdb768313665681315a0 Mon Sep 17 00:00:00 2001
From: Johannes Ranke <jranke@uni-bremen.de>
Date: Tue, 19 Feb 2019 20:17:59 +0100
Subject: Only plot when a Picture object is there

grConvert is not needed for plotting
---
 R/chent.R | 1 +
 1 file changed, 1 insertion(+)

(limited to 'R/chent.R')

diff --git a/R/chent.R b/R/chent.R
index 6a5abc7..c80cf06 100644
--- a/R/chent.R
+++ b/R/chent.R
@@ -463,6 +463,7 @@ draw_svg.chent = function(x, width = 300, height = 150,
 #' @example inst/examples/caffeine.R
 #' @export
 plot.chent = function(x, ...) {
+  if (is.null(x$Picture)) stop("No Picture object in chent, was RDKit available during creation?")
   grid.picture(x$Picture)
 }
 
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