<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div><br></div><div>Using bfield2root I see something very odd (hope the attachment goes through).</div><div><br></div><div>The field only seems nonzero between z=-100 and z=-60</div><div><br></div><div>Matt</div><div><img apple-inline="yes" id="7499514F-F390-4A6B-9A83-6876FF94D44E" height="453" width="686" apple-width="yes" apple-height="yes" src="cid:A03D7AC6-3631-4DE3-B6E1-70EDA97F76B7@indiana.edu"></div><div><br></div><div><br></div><div><br></div><div><br></div>On Jul 18, 2014, at 7:18 AM, David Lawrence <<a href="mailto:davidl@jlab.org">davidl@jlab.org</a>> wrote:<br><br><blockquote type="cite"><br>Hi Matt,<br><br> The output looks right. What happens if you run the bfield2root utility? This should<br>be built as part of the default sim-recon build. (Source is in $HALLD_HOME/src/programs/Utilities/bfield2root)<br><br>Draw the field map in ROOT using:<br><br>>bfield2root<br>>root bfield.root<br>root [1] Bz_vs_r_vs_z->Draw("colz")<br><br>Also, how are you checking that the field map is returning zeros?<br><br>Regards,<br>-David<br><br>On Jul 17, 2014, at 9:49 PM, Matthew Shepherd <<a href="mailto:mashephe@indiana.edu">mashephe@indiana.edu</a>> wrote:<br><br><blockquote type="cite"><br>Hi all,<br><br>Paul and I have been trying to understand why I cannot<br>get the example analysis software working and we seem<br>to have traced the problem down to the fact that the <br>magnetic field map is returning a zero field.<br><br>Does anyone know how to debug this? The startup<br>of the job suggests all is OK (I think):<br><br>JANA >>URL: sqlite:////home/s4/mashephe/gluex/ccdb.sqlite<br>JANA >>context: default<br>JANA >>Reading Magnetic field map from Magnets/Solenoid/solenoid_1350_poisson_20<br>130925 ...<br>Nx=251 Ny=1 Nz=43 ) at 0x7f46720a0ce0<br>Fine-mesh evio file does not exist.<br>Constructing the fine-mesh B-field map...<br>rmin: 0 rmax: 88.5 dr: 0.1 zmin: 0 zmax: 600 dz: 0.1vg.: 0.0Hz) <br>Number of points in z = 6000<br>Number of points in r = 885<br>JANA >>10599 entries found (Created Magnetic field map of type DMagneticFieldMap<br><br>I'm using:<br><br>sim-recon-2014-06-30<br>ccdb_1.02<br>hdds-2.1<br>jana_0.7.1p3<br><br>and a ccdb.sqlite file from July 14 (copied from Mark's web page link that day). I've also<br>tried the ccdb.sqlite file from dc2 conditions.<br><br>Matt<br><br><br>---------------------------------------------------------------------<br>Matthew Shepherd, Associate Professor<br>Department of Physics, Indiana University, Swain West 265<br>727 East Third Street, Bloomington, IN 47405<br><br>Office Phone: +1 812 856 5808<br><br><br>_______________________________________________<br>Halld-offline mailing list<br>Halld-offline@jlab.org<br>https://mailman.jlab.org/mailman/listinfo/halld-offline<br></blockquote><br></blockquote><br></body></html>