Hello Daniel, all,

SPLASH is wonderful, and I've used it for many years.  Recently, I started 
getting a new error, and I don't know what changed to cause this.  The 
message is "error: could not find closest sink particle, using origin 
instead", and it prevents me from progressing through the snapshots when by 
pressing n.  I can see the first snapshot with no problem, but as soon as I 
press n to advance, the error comes up and the same snapshot is 
re-rendered.  After upgrading to the latest SPLASH version, I get the same 
behavior.  I also get the same behavior regardless of whether there are 
only gas particles (type 1) or both gas particles and a compact object 
particle (type 2) in the simulation. Output with SPLASH_DEBUG=true is 
appended below up until the point of the error, which occurs immediately 
after I press n.

Daniel, I'll mention that you added StarSmasher file format to the latest 
version of SPLASH (thank you!!).  I emailed you a sample out file on Feb. 
22, 2020.  When I tested my previous and new version of SPLASH on duplicate 
copies of that sample out file today, both versions showed this error, even 
though I know the previous version worked for me earlier.  I'm not sure 
what I broke...

Thank you for any guidance you can offer!

Regards,
Jamie

$ splash -f starsmasher out0000.sph out0001.sph 
        _                _           _       _         _ 
      _(_)     ___ _ __ | | __ _ ___| |__   (_)     _ (_)
   _ (_)  _   / __| '_ \| |/ _` / __| '_ \      _  (_)   
  (_)  _ (_)  \__ \ |_) | | (_| \__ \ | | |  _ (_)  _    
      (_)  _  |___/ .__/|_|\__,_|___/_| |_| (_)  _ (_)   
          (_)  (_)|_| (_) (_)  (_)(_) (_)(_) (_)(_)      

  ( B | y ) ( D | a | n | i | e | l ) ( P | r | i | c | e )

  ( v3.0.1 [27th Aug 2020] Copyright (C) 2005-2020 )

 * SPLASH comes with ABSOLUTELY NO WARRANTY.
   This is free software; and you are welcome to redistribute it 
   under certain conditions (see LICENCE file for details). *

 http://users.monash.edu.au/~dprice/splash 
 [email protected] or [email protected]
 Please cite Price (2007), PASA, 24, 159-173 (arXiv:0709.0832) if you 
 use SPLASH in print and don't forget to send pics for the gallery

 splash.defaults not found: using default settings
           2  filenames read from command line
----------------------- out0000.sph -----------------------
 time             :    1.6192798439320789E-002
 N_total          :        99954
 N data columns   :           13
 >> last step ntot =       99954
 DEBUG: ncolumns from data read =  13
 DEBUG: nsteps in file   =   1
 splash.units not found

 setting plot limits: steps     1->    1 cols  1-> 13

  warning: mean_mu              min = max =  1.03E-24
 DEBUG: numplot =           13  ncalc =            0  ndataplots =          
 13

 You may choose from a delectable sample of plots
-------------------------------------------------------
   1) x                      8) density             
   2) y                      9) specific internal en
   3) z                     10) mean_mu             
   4) v\dx                  11) h                   
   5) v\dy                  12) du/dt               
   6) v\dz                  13) temperature         
   7) particle mass       
-------------------------------------------------------
  14) multiplot [   4 ]      m) set multiplot 
-------------------------------------------------------
 d(ata) p(age) o(pts) l(imits) le(g)end h(elp)
 r(ender) v(ector) x(sec/rotate) s,S(ave) q(uit)
-------------------------------------------------------
Please enter your selection now (y axis or option):2
(x axis) (default=1): 
(render) (0=none) ([0:13], default=0): 
(vector plot) (0=none, 4=v) ([0:4], default=0): 
 DEBUG: iplotz =            3
 DEBUG: imulti =  F  iamrendering =  F
 DEBUG: required(1:ncolumns) =  T T T F F F F F F F F F F
Graphics device/type (? to see list, default /xw):
----- t =     0.02, dump #    1 ------------------
 DEBUG: in plotstep, allocating local memory...
 DEBUG: in plotstep, allocated local memory successfully
 DEBUG: itracktype =            0  itrackoffset =            0
 DEBUG: interpolation weights not set because no rendering...
 DEBUG: querying colour index range
 DEBUG: setting colour table
 DEBUG: querying colour table
 using colour scheme red
 DEBUG: finished colour_set
 DEBUG: starting frame loop...
 DEBUG: initialising data plots... T T           1           2       99954  
     99954
 DEBUG: iplotz =            3
 DEBUG: setting itrans...
 DEBUG:            1 : xmin,max adaptive =  -0.82873678084526980      
 0.82873678084526936     
 DEBUG:            2 : ymin,max adaptive =  -0.82559914511449506      
 0.82559914511449528     
 DEBUG: starting coord plot...
 DEBUG: entering page setup
 x min, max = -.82873678084526980  .82873678084526936
 y min, max = -.82559914511449506  .82559914511449528
 DEBUG: calling setpage...           1
 DEBUG: xmin,xmax,ymin,ymax= -0.82873678084526980      
 0.82873678084526936      -0.82559914511449506       0.82559914511449528    
 
 DEBUG: printing axes  T T           1           1           1
 DEBUG: setpage ok, querying and saving viewport...
 DEBUG: finished page setup
 DEBUG: starting particle plot with        99954  particles  
-0.11941106894581849       -9.2874214057261817E-002  
-6.6338128534802435E-002  -3.9802731272709689E-002  
-1.3267613468660570E-002   1.3267542630963939E-002  
 3.9802939503670288E-002   6.6339152559756712E-002  
 9.2875986361419666E-002 -0.14594748574426214                1           1  
         1           1           1           1           1           1      
     1           1       99954           0           0           0          
 0           0           0           0           0           0           0  
         0           0           0           0           0           0      
     0           0           0           0           0           0          
 0 T F F F F F F F F F F F F F F F F F F F F F F F
  fast-plotted        99954  of        99954 gas particles
 -------------- interactive mode commands -----------------------------
  SPACE BAR                : skip to next timestep/file
  0,1,2,3..9 and click     : go forward/back n timesteps (back=r.click)
  left click (or A)        : zoom/select
  right click (or X or b)  : previous timestep
  shift+left click         : IRREGULAR particle selection
  left click on colour bar : change rendering limits
  +/-      : zoom IN/OUT (_ for out by 20%) 
  a        : (a)dapt plot limits (inside box, over axes or colour bar)
  l        : (l)og / unlog axis  (over x/y axis or colour bar)
  o/C/n    : re-centre plot on (o)rigin/(C)ursor/(n)earest sink position
  backspace: delete annotation  (over axes, legend, title or colour bar)
  r        : (r)eplot current plot
  R        : (R)eset/remove all range restrictions
  p/c      : label closest (p)article/plot (c)ircle of interaction
  t        : t)rack closest particle/turn tracking off (coord plots only)
  g        : plot a line and find its g)radient
  ctrl-t   : add text annotation at current position
  ctrl-m   : toggle Hollywood mode
  G/T/H    : move le(G)end, (T)itle or (H) vector legend to current position
  m/M/i    : change colour map (m=next,M=previous,i=invert) (rendered plots 
only)
  v/V/w    : decrease/increase/adapt arrow size on vector plots (Z for x10)
  k/K      : decrease/increase opacity on opacity-rendered plots (Z for x10)
  e/E      : use current frame/settings as end point to animation sequence
  , . < >  : rotate about z axis by +(-) 15,30 degrees (coord plots only)
  [ ] { }  : rotate about x axis by +/- 15,30 degrees (coord plots only)
  / \ ? |  : rotate about y axis by +/- 15,30 degrees (coord plots only)
  x        : take cross section (coord plots only)
  u/U/d/D  : move cross section/perspective pos. up/down (towards/away from 
observer)
  s        : (s)ave current settings for all steps
  q/Q/esc  : (q)uit plotting
  z/Z(oom) : timestepping, zoom and limits-changing multiplied by 10
 ----------------------------------------------------------------------
 error: could not find closest sink particle, using origin instead

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