[aspect-devel] Failure to converge

[Eric Heien]

I just tried running the latest version of Aspect (with the latest deal.ii repository code) and I get the following error when using box.prm:

login1$ ./lib/aspect box.prm 
Number of active cells: 256 (on 5 levels)
Number of degrees of freedom: 3,556 (2,178+289+1,089)

*** Timestep 0:  t=0 seconds
   Solving temperature system... 1 iterations.
   Rebuilding Stokes preconditioner...
   Solving Stokes system... 

+---------------------------------------------+------------+------------+
| Total wallclock time elapsed since start    |      10.7s |            |
|                                             |            |            |
| Section                         | no. calls |  wall time | % of total |
+---------------------------------+-----------+------------+------------+
| Assemble Stokes system          |         1 |    0.0248s |      0.23% |
| Assemble temperature system     |         1 |    0.0464s |      0.43% |
| Build Stokes preconditioner     |         1 |    0.0247s |      0.23% |
| Build temperature preconditioner|         1 |   0.00457s |     0.043% |
| Solve Stokes system             |         1 |      10.6s |        99% |
| Solve temperature system        |         1 |  0.000835s |    0.0078% |
| Setup dof systems               |         1 |    0.0265s |      0.25% |
+---------------------------------+-----------+------------+------------+



----------------------------------------------------
Exception on processing: 
Iterative method reported convergence failure in step 2467 with residual 5.67724
Aborting!
----------------------------------------------------

This same error occurs on 3 different platforms so I don't think it's a problem with my setup.  Has something changed lately in Aspect that would cause this?

Thanks,

-Eric