diff -u -r1.12 -r1.13
--- LocalHelixExtrapolator.java	15 Aug 2008 16:55:30 -0000	1.12
+++ LocalHelixExtrapolator.java	15 Aug 2008 17:12:54 -0000	1.13
@@ -70,6 +70,7 @@

     double m_track_phi1 = 0.0;
     boolean m_track_dphi_negative = false;
     EventHeader m_event = null;

+    int m_trackCharge = 0;

 
     boolean _debug = false;
     boolean m_debugChargeFlip = false;

@@ -325,6 +326,7 @@

 	m_track_phi0 = phi0;
 	m_track_phi1 = phi1;
 	m_track_z0 = z0;

+	m_trackCharge = tr.getCharge();

 	if (m_endcapValid) {
 	    m_trackPoint_z = found_endcap_z;
 	    m_trackPoint_phi = found_endcap_phi;

@@ -409,7 +411,7 @@

     /** Assumes extrapolation has already been done. */
     public Hep3Vector getTangent() {
 	double dphi = 0.01;

-	if (tr.getCharge() > 0) { dphi = -0.01; }

+	if (m_trackCharge > 0) { dphi = -0.01; }

 	double dx = m_trackParam_radius * ( Math.cos(m_trackPoint_phi+dphi) - Math.cos(m_trackPoint_phi) );
 	double dy = m_trackParam_radius * ( Math.sin(m_trackPoint_phi+dphi) - Math.sin(m_trackPoint_phi) );
 	double dz = m_trackParam_dz_by_dphi * dphi;

@@ -437,7 +439,7 @@

             System.out.println("R from p/0.3B=  " + r + " magnetic field= " + zField);
         }
 

-        if(m_track_dphi_negative && tr.getCharge() < 0) {

+        if(m_track_dphi_negative && m_trackCharge < 0) {

 	    if (m_debugChargeFlip || _debug) {
 		System.out.println("Error: rotational direction is wrong");
 		System.out.println("Charge is negative but it is determined to turn clockwise");

@@ -445,7 +447,7 @@

 	}
                                                                                                                               
         double dphi = 0.01;

-	if (tr.getCharge() > 0) { dphi = -0.01; }

+	if (m_trackCharge > 0) { dphi = -0.01; }

         double dx = m_trackParam_radius * ( Math.cos(phi0+dphi) - Math.cos(phi0) );
         double dy = m_trackParam_radius * ( Math.sin(phi0+dphi) - Math.sin(phi0) );
         double dz = m_trackParam_dz_by_dphi * dphi;