# DC equation coefficients inconsistent or stale?

2 messages
 I encountered a curious fea.phys.dc.eqn.coef state which I do not recall as causing an error or preventing the generation of a solution, but which may be of interest, especially in light of an earlier post:  http://forum.featool.com/Index-exceeds-array-bounds-after-split-object-tp969.htmlI have not been able to reproduce this and the file is very large (20Mb).  I have placed it at: http://randress.com/featool/stale_conductivity.fea ... for download if needed. I exported the fea struct to the MATLAB workspace and found this: >> print_geom_objects(fea.geom) *** 4 geom objects *** --> Gen 0 (Active Objects) 1: 'B1', 'block' min max x: -60.000000 60.000000 y: -5.000000 5.000000 z: -5.000000 5.000000 2: 'S2', 'sphere' center: 50.000000 0.000000 0.000000 radius: 0.008680 axis: 1 (1/2/3 ==> x/y/z axis direction) 3: 'S1', 'sphere' center: -50.000000 0.000000 0.000000 radius: 0.008680 axis: 1 (1/2/3 ==> x/y/z axis direction) 4: 'E1', 'ellipsoid' center: -49.000000 0.000000 0.000000 radii: 0.125000 0.175000 0.875000 axis: 0.000000 0.000000 1.000000 *** end print_geom_objects *** >> fea.phys.dc.eqn.coef ans 4×4 cell array {'dts_dc'} {'d<…'} {'Time scaling co…'} {1×6 cell} {'s_dc' } {'σQ' } {'Current source' } {1×6 cell} {'V0_dc' } {'> fea.phys.dc.eqn.coef{2,:} ans = 's_dc' ans = 'σ' ans = 'Electric conductivity' ans = 1×6 cell array {'.16'} {'6e7'} {'6e7'} {'.355'} {'6e7'} {'.355'} I have no doubt that earlier this model had 6 subdomains from which the extra sets of elements must have come.  I realize that this does not necessarily indicate a bug; stale data that is not referenced would not be a problem but it just seems suspicious. Please let me know if there is anything additional that I should add. Kind regards, Randal