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<p style="margin-top:0;margin-bottom:0">OK. Thanks a lot!</p>
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<p style="margin-top:0;margin-bottom:0">Rongyang</p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Comp-phys-alps-users <comp-phys-alps-users-bounces@lists.phys.ethz.ch> on behalf of Michele Dolfi <michele.dolfi@gmail.com><br>
<b>Sent:</b> Sunday, December 17, 2017 5:46:32 PM<br>
<b>To:</b> comp-phys-alps-users@lists.phys.ethz.ch<br>
<b>Subject:</b> Re: [ALPS-users] Maybe a DataSet.props bug for ALPS MPS Project</font>
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<div class="" style="word-wrap:break-word; line-break:after-white-space">Hello,
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<div class="">Thanks for reporting this behavior.</div>
<div class="">We started investigating it a bit and it doesn’t seem to be related to the MPS applications, but to the ALPS Parameters class.</div>
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<div class="">Attached is a small test.</div>
<div class="">Just running "h5dump test.h5” shows the buggy output.</div>
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<div class="">Michele</div>
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<div class="">On 13 Dec 2017, at 10:02, Rongyang Sun <<a href="mailto:sun-rongyang@outlook.com" class="">sun-rongyang@outlook.com</a>> wrote:</div>
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<div class="" style="margin-top:0px; margin-bottom:0px">Dear all,</div>
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<div class="" style="margin-top:0px; margin-bottom:0px">I found an interesting wrong var assignment in ALPS MPS Project version: MAQUIS repo r4143 (2013-2014). It appears both on OSX bmg package version and builds from source code version on Linux. You can
use the following simple script to reappear the problem:</div>
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<div class="" style="margin-top:0px; margin-bottom:0px">********************************************************</div>
<div class="" style="margin-top:0px; margin-bottom:0px"># </div>
<div class="" style="margin-top:0px; margin-bottom:0px"># Author: Rongyang Sun <<a href="mailto:sun-rongyang@outlook.com" class="">sun-rongyang@outlook.com</a>></div>
<div class="" style="margin-top:0px; margin-bottom:0px"># Date: 2017-12-13 11:59</div>
<div class="" style="margin-top:0px; margin-bottom:0px"># Last Modified Date: 2017-12-13 11:59</div>
<div class="" style="margin-top:0px; margin-bottom:0px"># Last Modified By: Rongyang Sun <<a href="mailto:sun-rongyang@outlook.com" class="">sun-rongyang@outlook.com</a>></div>
<div class="" style="margin-top:0px; margin-bottom:0px"># </div>
<div class="" style="margin-top:0px; margin-bottom:0px"># Description: A demo to show the interesting bug</div>
<div class="" style="margin-top:0px; margin-bottom:0px"># </div>
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<div class="" style="margin-top:0px; margin-bottom:0px">import pyalps</div>
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<div class="" style="margin-top:0px; margin-bottom:0px">#prepare the input parameters</div>
<div class="" style="margin-top:0px; margin-bottom:0px">parms = [ { </div>
<div class="" style="margin-top:0px; margin-bottom:0px"> 'LATTICE' : "open chain lattice", </div>
<div class="" style="margin-top:0px; margin-bottom:0px"> 'MODEL' : "spin",</div>
<div class="" style="margin-top:0px; margin-bottom:0px"> 'CONSERVED_QUANTUMNUMBERS' : 'N,Sz',</div>
<div class="" style="margin-top:0px; margin-bottom:0px"> 'Sz_total' : 0,</div>
<div class="" style="margin-top:0px; margin-bottom:0px"> 'J' : 1,</div>
<div class="" style="margin-top:0px; margin-bottom:0px"> 'spin' : 1,</div>
<div class="" style="margin-top:0px; margin-bottom:0px"> 'SWEEPS' : 4,</div>
<div class="" style="margin-top:0px; margin-bottom:0px"> 'NUMBER_EIGENVALUES' : 1,</div>
<div class="" style="margin-top:0px; margin-bottom:0px"> 'L' : 10,</div>
<div class="" style="margin-top:0px; margin-bottom:0px"> 'MAXSTATES' : 100</div>
<div class="" style="margin-top:0px; margin-bottom:0px"> } ]</div>
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<div class="" style="margin-top:0px; margin-bottom:0px">input_file = pyalps.writeInputFiles('bug',parms)</div>
<div class="" style="margin-top:0px; margin-bottom:0px">res = pyalps.runApplication('mps_optim',input_file,writexml=True)</div>
<div class="" style="margin-top:0px; margin-bottom:0px">data = pyalps.loadEigenstateMeasurements(pyalps.getResultFiles(prefix='bug'),verbose=True)</div>
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<div class="" style="margin-top:0px; margin-bottom:0px">print("\nMODEL: {0}".format(str(data[0][0].props['MODEL'])))</div>
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<div class="" style="margin-top:0px; margin-bottom:0px">It will return "MODEL: 1" not the right "MODEL" parameter because I define an unused parameter 'spin' with value 1. Once a parameter with a name which appears at the value of 'MODEL', it will be replaced
by the value of the parameter. It is more severe for 't-J' model case. if you set 't': 1.0 and 'J': 0.5, 'MODEL' will be assigned as 0.5 which equals 1.0('t') - 0.5('J')! I have checked the output hdf5 file and found that the wrong replace had happened in
the file. That means it may be a bug about ALPS MPS code.</div>
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<div class="" style="margin-top:0px; margin-bottom:0px">Best regards,</div>
<div class="" style="margin-top:0px; margin-bottom:0px">Rongyang Sun</div>
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