Index: /issm/trunk-jpl/src/c/classes/Elements/Tria.cpp
===================================================================
--- /issm/trunk-jpl/src/c/classes/Elements/Tria.cpp	(revision 24979)
+++ /issm/trunk-jpl/src/c/classes/Elements/Tria.cpp	(revision 24980)
@@ -117,5 +117,5 @@
 
 	tria->hvertices = (Hook*)this->hvertices->copy();
-	tria->hmaterial = (Hook*)this->hmaterial->copy();
+	if(this->hmaterial)tria->hmaterial = (Hook*)this->hmaterial->copy();
 	tria->hneighbors = NULL;
 
@@ -139,5 +139,5 @@
 
 	tria->vertices = (Vertex**)this->hvertices->deliverp();
-	tria->material = (Material*)this->hmaterial->delivers();
+	if(this->hmaterial)tria->material = (Material*)this->hmaterial->delivers();
 
 	return tria;
@@ -3943,5 +3943,5 @@
 	for(int i=0;i<this->numanalyses;i++) if(this->hnodes[i]) this->hnodes[i]->reset();
 	this->hvertices->reset();
-	this->hmaterial->reset();
+	if(this->hmaterial)this->hmaterial->reset();
 	if(this->hneighbors) this->hneighbors->reset();