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<span style="text-transform: none;">Dear Einstein Toolkit Users,</span></div>
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I am a new Einstein Toolkit user, and I have some questions about a BNS simulation.</div>
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<span style="color: rgb(0, 0, 0);">I am trying to run a BNS simulation using bns.par, which I downloaded from Einstein Toolkit Gallery (</span><span style="color: rgb(0, 120, 212);"><a href="https://einsteintoolkit.org/gallery/bns/index.html" title="https://einsteintoolkit.org/gallery/bns/index.html" data-outlook-id="b9dc7b80-1363-43e8-b00f-679974918765" style="color: rgb(0, 120, 212);">https://einsteintoolkit.org/gallery/bns/index.html</a></span><span style="color: rgb(0, 0, 0);">)
and slightly modified.</span></div>
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I can successfully create and submit the simulation but the following message appears during the simulation:</div>
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INFO (IllinoisGRMHD): C2P: Iter. # 0, Lev: 5 NumPts= 132300 | Backups: 0 0 0 | Fixes: VL= 0 rho*= 0 Averaged pts = 38250 Font1D 38250 | Failures: 2250 InHoriz= 0 / 0 | 1.00 iters/gridpt Error, Sum: rho 6.378e-08, 2.433e-05 | tau nan, -nan | Sx nan, nan | Sy
nan, nan | Sz nan, nan</div>
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To investigate this problem, I added the following parameters:</div>
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Multipole::interpolator_name = "Lagrange polynomial interpolation"<br>
Multipole::interpolator_pars = "order=4"</div>
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I also changed the parameter Driver::ghost_size from 3 to 4, but the same error occurred.</div>
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I would like to ask:</div>
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<div role="presentation"><span style="text-transform: none;">What could cause tau, Sx, Sy, and Sz to become NaN in this situation?</span></div>
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<div role="presentation"><span style="text-transform: none;">Does this indicate a failure of C2P conversion?</span></div>
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<div role="presentation"><span style="text-transform: none;">Are there any parameter settings or initial data that I should check first?</span></div>
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Additionally, I have another question. When I use kuibit to extract Psi4, I expected to obtain the full time series (or all available modes) but the returned object contains only one element, for example, </div>
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SimDir.gws[100][(2,2)].y=[-9.79586237e-15-5.27476073e-14j].</div>
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Other attributes such as</div>
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SimDir.gws[100][(2,2)].x </div>
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also contain only one element. Is this a correct behavior or could it indicate a problem with my .par file? </div>
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For reference, I have attached my parameter file.</div>
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Thank you very much for your time and any suggestions.</div>
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Best regards,</div>
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<p style="text-align: left; text-indent: 0px; text-transform: none; margin-top: 0px; margin-bottom: 0px;">
<span style="font-family: "Yu Gothic Regular"; font-size: 12pt; color: rgb(0, 0, 0); text-transform: none;">Taiki Makino</span></p>
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<span style="font-family: "Yu Gothic Regular"; font-size: 12pt; color: rgb(0, 0, 0);">Graduate School of Science, Nagoya University</span></p>
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<span style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 120, 212);"><a href="mailto:makino.taiki.g6@s.mail.nagoya-u.ac.jp" class="ms-outlook-linkify" title="mailto:makino.taiki.g6@s.mail.nagoya-u.ac.jp" data-outlook-id="6d81fc28-cd0c-48ea-aead-675b28048b3b" style="color: rgb(0, 120, 212); margin-top: 0px; margin-bottom: 0px;"><u>makino</u>.taiki.g6@s.mail.nagoya-u.ac.jp</a></span></p>
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