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Can look. Can you make available the LCIO file output by the readout simulation? On Tue, 13 May 2014, Chad Civello wrote: > Hello All, > > I am wondering if anyone is familiar with a reconstruction error that I am > running into. When attempting to run reconstruction with the > HPS2014OfflineTruthRecon.lcsim steering file, the process quits with an > error caused by finding a negative value of the variable "t". Upon further > investigation, it seems that a negative "t" will cause an imaginary path > length of the track, calculated in WTrack.java. The physics behind > calculating t is beyond me, involving combinations of a momentum vector, a > magnetic field unit vector, and a unit vector of a plane. I am able to step > through 590 events before this error occurs, so it seems to be something > with this individual event that is stopping reconstruction from continuing. > > The file being run through reconstruction is created from running an event > file in SLIC with the HPS-Proposal2014-v5-6pt6 detector, and then passing > this file through readout simulation with the HPS2014ReadoutNoPileup.lcsim. > The output error is listed below. > > As a test on the steering file and drivers, I ran a smaller input file > through the same reconstruction without an error. However, out of 165 > triggered events, I am only seeing 14 tracks. Is there a reason that so few > tracks would be found? Thank you for the help. > > > Regards, > > Chad Civello > University of New Hampshire > > >>> Event 585 >>> Event 586 >>> Event 587 >>> Event 588 >>> Event 589 >>> Event 590 > getPathLengthToPlaneApprox ERROR t is negative (-0.09475479432494227)! > p 0.30696444517303073 rho -0.0014649536585467351 a -4.4968868700000003E-4 > A -3.2568853514089034E-4 B 0.8943517247214046 C -686.7142264081292 > track params: 0.2785713187164182, -0.12804764158077803, > -0.01513249730159967, 0.30696444517303073, 16.49545255281126, > 35.88633038244529, 0.656055763097405, > xp [ 702.45, 71.390, -27.331] > eta [ 0.99953, 0.030515, 0.0000] > h [ 0.0000, 0.0000, -1.0000] > > ######################################################################## > Use REPLY-ALL to reply to list > > To unsubscribe from the HPS-SOFTWARE list, click the following link: > https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=HPS-SOFTWARE&A=1 > ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the HPS-SOFTWARE list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=HPS-SOFTWARE&A=1