diff --git a/src/dxfdata.cc b/src/dxfdata.cc
index 9b61b939..4afe512f 100644
--- a/src/dxfdata.cc
+++ b/src/dxfdata.cc
@@ -175,7 +175,7 @@ DxfData::DxfData(double fn, double fs, double fa,
 				in_blocks_section = iddata == "BLOCKS";
 			}
 			else if (mode == "LINE") {
-				ADD_LINE(xverts[0], yverts[0], xverts[1], yverts[1]);
+				ADD_LINE(xverts.at(0), yverts.at(0), xverts.at(1), yverts.at(1));
 			}
 			else if (mode == "LWPOLYLINE") {
 				assert(xverts.size() == yverts.size());
@@ -185,12 +185,12 @@ DxfData::DxfData(double fn, double fs, double fa,
 					ADD_LINE(xverts[i-1], yverts[i-1], xverts[i%numverts], yverts[i%numverts]);
 				}
 				if (dimtype & 0x01) { // closed polyline
-					ADD_LINE(xverts[numverts-1], yverts[numverts-1], xverts[0], yverts[0]);
+					ADD_LINE(xverts.at(numverts-1), yverts.at(numverts-1), xverts.at(0), yverts.at(0));
 				}
 			}
 			else if (mode == "CIRCLE") {
 				int n = Calc::get_fragments_from_r(radius, fn, fs, fa);
-				Vector2d center(xverts[0], yverts[0]);
+				Vector2d center(xverts.at(0), yverts.at(0));
 				for (int i = 0; i < n; i++) {
 					double a1 = (2*M_PI*i)/n;
 					double a2 = (2*M_PI*(i+1))/n;
@@ -199,7 +199,7 @@ DxfData::DxfData(double fn, double fs, double fa,
 				}
 			}
 			else if (mode == "ARC") {
-				Vector2d center(xverts[0], yverts[0]);
+				Vector2d center(xverts.at(0), yverts.at(0));
 				int n = Calc::get_fragments_from_r(radius, fn, fs, fa);
 				while (arc_start_angle > arc_stop_angle)
 					arc_stop_angle += 360.0;
@@ -217,9 +217,9 @@ DxfData::DxfData(double fn, double fs, double fa,
 				// Commented code is meant as documentation of vector math
 				while (ellipse_start_angle > ellipse_stop_angle) ellipse_stop_angle += 2 * M_PI;
 //				Vector2d center(xverts[0], yverts[0]);
-				Vector2d center(xverts[0], yverts[0]);
+				Vector2d center(xverts.at(0), yverts.at(0));
 //				Vector2d ce(xverts[1], yverts[1]);
-				Vector2d ce(xverts[1], yverts[1]);
+				Vector2d ce(xverts.at(1), yverts.at(1));
 //				double r_major = ce.length();
 				double r_major = sqrt(ce[0]*ce[0] + ce[1]*ce[1]);
 //				double rot_angle = ce.angle();
@@ -270,10 +270,10 @@ DxfData::DxfData(double fn, double fs, double fa,
 					double ly1 = this->points[blockdata[iddata][i].idx[0]][1] * ellipse_stop_angle;
 					double lx2 = this->points[blockdata[iddata][i].idx[1]][0] * ellipse_start_angle;
 					double ly2 = this->points[blockdata[iddata][i].idx[1]][1] * ellipse_stop_angle;
-					double px1 = (cos(a)*lx1 - sin(a)*ly1) * scale + xverts[0];
-					double py1 = (sin(a)*lx1 + cos(a)*ly1) * scale + yverts[0];
-					double px2 = (cos(a)*lx2 - sin(a)*ly2) * scale + xverts[0];
-					double py2 = (sin(a)*lx2 + cos(a)*ly2) * scale + yverts[0];
+					double px1 = (cos(a)*lx1 - sin(a)*ly1) * scale + xverts.at(0);
+					double py1 = (sin(a)*lx1 + cos(a)*ly1) * scale + yverts.at(0);
+					double px2 = (cos(a)*lx2 - sin(a)*ly2) * scale + xverts.at(0);
+					double py2 = (sin(a)*lx2 + cos(a)*ly2) * scale + yverts.at(0);
 					ADD_LINE(px1, py1, px2, py2);
 				}
 			}
@@ -385,6 +385,9 @@ DxfData::DxfData(double fn, double fs, double fa,
     catch (boost::bad_lexical_cast &blc) {
 	  	PRINTB("WARNING: Illegal value %s in '%s'", data % filename);
   	}
+    catch (const std::out_of_range& oor) {
+	  	PRINTB("WARNING: not enough input values for %s in '%s'", data % filename);
+  	}
 	}
 
 	BOOST_FOREACH(const EntityList::value_type &i, unsupported_entities_list) {
diff --git a/testdata/dxf/nothing-decimal-comma-separated.dxf b/testdata/dxf/nothing-decimal-comma-separated.dxf
new file mode 100644
index 00000000..d7ef27ea
--- /dev/null
+++ b/testdata/dxf/nothing-decimal-comma-separated.dxf
@@ -0,0 +1,140 @@
+999
+This tests should not crash but produce no visible result, see former issue 593.
+0
+SECTION
+2
+HEADER
+9
+$EXTMIN
+10
+-6,63671875
+20
+-0,0244140625
+30
+0,5
+9
+$EXTMAX
+10
+7,1357421875
+20
+0,921875
+30
+0,5
+0
+ENDSEC
+0
+SECTION
+2
+TABLES
+0
+TABLE
+2
+VPORT
+0
+VPORT
+2
+*ACTIVE
+41
+  1.000000
+0
+ENDTAB
+0
+TABLE
+2
+LAYER
+0
+LAYER
+2
+0
+62
+0
+0
+ENDTAB
+0
+ENDSEC
+0
+SECTION
+2
+BLOCKS
+0
+ENDSEC
+0
+SECTION
+2
+ENTITIES
+0
+LINE
+8
+0
+62
+0
+10
+0,1
+20
+0,1
+30
+0
+11
+2,5
+21
+0
+31
+0
+0
+LINE
+8
+0
+62
+0
+10
+2,5
+20
+0
+30
+0
+11
+2,5
+21
+2,5
+31
+0
+0
+LINE
+8
+0
+62
+0
+10
+2,5
+20
+2,5
+30
+0
+11
+0
+21
+2,5
+31
+0
+0
+LINE
+8
+0
+62
+0
+10
+0
+20
+2,5
+30
+0
+11
+0,1
+21
+0,1
+31
+0
+0
+ENDSEC
+0
+EOF
diff --git a/testdata/scad/dxf/nothing-decimal-comma-separated.scad b/testdata/scad/dxf/nothing-decimal-comma-separated.scad
new file mode 100644
index 00000000..204ce08f
--- /dev/null
+++ b/testdata/scad/dxf/nothing-decimal-comma-separated.scad
@@ -0,0 +1,2 @@
+// This tests should not crash but produce no visible result, see former issue 593.
+import("../../nothing-decimal-comma-separated.dxf");
diff --git a/tests/regression/cgalpngtest/nothing-decimal-comma-separated-expected.png b/tests/regression/cgalpngtest/nothing-decimal-comma-separated-expected.png
new file mode 100644
index 00000000..5c4279ed
Binary files /dev/null and b/tests/regression/cgalpngtest/nothing-decimal-comma-separated-expected.png differ
diff --git a/tests/regression/opencsgtest/nothing-decimal-comma-separated-expected.png b/tests/regression/opencsgtest/nothing-decimal-comma-separated-expected.png
new file mode 100644
index 00000000..5c4279ed
Binary files /dev/null and b/tests/regression/opencsgtest/nothing-decimal-comma-separated-expected.png differ
diff --git a/tests/regression/throwntogethertest/nothing-decimal-comma-separated-expected.png b/tests/regression/throwntogethertest/nothing-decimal-comma-separated-expected.png
new file mode 100644
index 00000000..5c4279ed
Binary files /dev/null and b/tests/regression/throwntogethertest/nothing-decimal-comma-separated-expected.png differ