From 0fd3c69579b5641755baf411542cf9f949e4689d Mon Sep 17 00:00:00 2001
From: Thomas Krijnen <t.krijnen@gmail.com>
Date: Tue, 30 Apr 2019 11:54:56 +0200
Subject: [PATCH] FindFromKey() backwards compat

---
 src/ifcgeom/IfcGeomFunctions.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/ifcgeom/IfcGeomFunctions.cpp b/src/ifcgeom/IfcGeomFunctions.cpp
index 829732aad5..a538dcbeee 100644
--- a/src/ifcgeom/IfcGeomFunctions.cpp
+++ b/src/ifcgeom/IfcGeomFunctions.cpp
@@ -3449,8 +3449,17 @@ bool IfcGeom::Kernel::triangulate_wire(const TopoDS_Wire& wire, TopTools_ListOfS
 	// Validation
 
 	for (int i = 1; i <= mape.Extent(); ++i) {
+#if OCC_VERSION_HEX >= 0x70000
 		TopTools_ListOfShape val;
 		if (!mapn.FindFromKey(mape.FindKey(i), val)) {
+#else
+		bool contains = false;
+		try {
+			TopTools_ListOfShape val = mapn.FindFromKey(mape.FindKey(i));
+			contains = true;
+		} catch (Standard_NoSuchObject&) {}
+		if (!contains) {
+#endif
 			// All existing edges need to exist in the new faces
 			Logger::Error("Internal error, missing edge from triangulation");
 			if (faceset_helper_ != nullptr) {