<div dir="ltr">Dear all,<div><br></div><div>I am using FLASH4.5 and trying to use the self-gravity unit in my simulation.</div><div><br></div><div>It seems that the Multigrid and Multipole solvers cannot support the 2D cartesian geometry, so I try to use the Pfft solver.</div><div><br></div><div>However, when I tried to use the unit by the setup:</div><div>"<span style="color:rgb(69,69,69);font-family:Helvetica;font-size:12px">./</span><b style="color:rgb(69,69,69);font-family:Helvetica;font-size:12px">setup</b><span style="color:rgb(69,69,69);font-family:Helvetica;font-size:12px"> <simulation> -auto -with-unit=physics/Gravity/GravityMain/Poisson/Pfft -nxb=512 -nyb=512 +ug</span>"</div><div><br></div><div>The compilation failed with the error message:</div><div>"""</div><div>




<span></span>





<p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-weight:normal;font-stretch:normal;font-size:12px;line-height:normal;font-family:Helvetica;color:rgb(69,69,69)">Sorry, I am unable to build gr_pfftSpecifyTransform.o mentioned in Makefile.Grid</p>
<p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-weight:normal;font-stretch:normal;font-size:12px;line-height:normal;font-family:Helvetica;color:rgb(69,69,69)">Related directory contents:</p>
<p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-weight:normal;font-stretch:normal;font-size:12px;line-height:normal;font-family:Helvetica;color:rgb(69,69,69)">If you do not see an appropriate source file, gr_pfftSpecifyTransform.o is probably mentioned in the</p>
<p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-weight:normal;font-stretch:normal;font-size:12px;line-height:normal;font-family:Helvetica;color:rgb(69,69,69)">wrong Makefile and should probably go deeper inside the Grid unit</p>
<p class="gmail-p1" style="margin:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-weight:normal;font-stretch:normal;font-size:12px;line-height:normal;font-family:Helvetica;color:rgb(69,69,69)">Makefile:144: recipe for target 'gr_pfftSpecifyTransform.o' failed</p>"""</div><div><br></div><div>I tried to modify the Makefile under the GridSolvers/Pfft/ directory, but it still could not get the files under the GridSolvers/Pfft/DirectorSolver/ directory.</div><div><br></div><div>Is the Pfft solver of Gravity usable?</div><div><br></div><div>If so, how can I use the solver?</div><div><br></div><div>Thank you very much.</div><div><br></div><div>Best regards,</div><div>Chia-Jung</div><div><br></div></div>