From 7134df4638e6fee0ba1ae1f480c9d1c0574a0502 Mon Sep 17 00:00:00 2001
From: Alessandro Ranellucci <aar@cpan.org>
Date: Mon, 3 Jun 2013 11:39:23 +0200
Subject: [PATCH] Only skip objects with no layers without stopping the whole
 job

---
 lib/Slic3r/Print.pm        | 7 +++++++
 lib/Slic3r/Print/Object.pm | 4 ----
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/lib/Slic3r/Print.pm b/lib/Slic3r/Print.pm
index c3fbb7b34..0d5830614 100644
--- a/lib/Slic3r/Print.pm
+++ b/lib/Slic3r/Print.pm
@@ -322,6 +322,13 @@ sub export_gcode {
     $status_cb->(10, "Processing triangulated mesh");
     $_->slice for @{$self->objects};
     
+    # remove empty layers and abort if there are no more
+    # as some algorithms assume all objects have at least one layer
+    # note: this will change object indexes
+    @{$self->objects} = grep @{$_->layers}, @{$self->objects};
+    die "No layers were detected. You might want to repair your STL file(s) or check their size and retry.\n"
+        if !@{$self->objects};
+    
     if ($Slic3r::Config->resolution) {
         $status_cb->(15, "Simplifying input");
         $self->_simplify_slices(scale $Slic3r::Config->resolution);
diff --git a/lib/Slic3r/Print/Object.pm b/lib/Slic3r/Print/Object.pm
index 6e8067382..dc5428dc9 100644
--- a/lib/Slic3r/Print/Object.pm
+++ b/lib/Slic3r/Print/Object.pm
@@ -190,7 +190,6 @@ sub slice {
     
     # remove last layer(s) if empty
     pop @{$self->layers} while @{$self->layers} && (!map @{$_->lines}, @{$self->layers->[-1]->regions});
-    die "Invalid or too thin input file: no layers could be generated\n" if !@{$self->layers};
     
     foreach my $layer (@{ $self->layers }) {
         # make sure all layers contain layer region objects for all regions
@@ -277,9 +276,6 @@ sub slice {
             $self->layers->[$i]->id($i);
         }
     }
-    
-    warn "No layers were detected. You might want to repair your STL file and retry.\n"
-        if !@{$self->layers};
 }
 
 sub make_perimeters {