From d6320495e79ecc2839990d41651bb33582e26af8 Mon Sep 17 00:00:00 2001
From: gka <gka@opencascade.com>
Date: Tue, 6 Mar 2012 14:38:49 +0400
Subject: [PATCH] 0022993: Crash during reading STEP file

---
 src/STEPControl/STEPControl_ActorRead.cxx | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/STEPControl/STEPControl_ActorRead.cxx b/src/STEPControl/STEPControl_ActorRead.cxx
index 50b92ca29c..ccca047fdc 100755
--- a/src/STEPControl/STEPControl_ActorRead.cxx
+++ b/src/STEPControl/STEPControl_ActorRead.cxx
@@ -271,6 +271,8 @@ Handle(Transfer_Binder)  STEPControl_ActorRead::Transfer
     DeclareAndCast( HeaderSection_FileName, aFileNameEntity, anEntIt.Value() );
     if ( !aFileNameEntity.IsNull() ) {
       Handle(TCollection_HAsciiString) aPPVersion = aFileNameEntity->PreprocessorVersion();
+      if(aPPVersion.IsNull())
+        continue;
       #ifdef DEB
       cout << "Preprocessor version detected: " << aPPVersion->ToCString() << endl;
       #endif