[Rsiena-help] What does this error mean?

[Victor, Jennifer Nicoll]

After letting my RSiena model for 12 hours on a high memory machine I received the following output.  What advice can you provide to help me overcome this error?

> myusmodel<-sienaModelCreate(useStdInits=FALSE, projname='siena_us_01')
> usans01<-siena07(myusmodel, data=myusdata,effects=myeffus)
No X11 device available, forcing use of batch mode
Start phase 0 
theta: 0.0342 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 

Start phase 1 
Phase 1 Iteration 1 Progress: 0%
Phase 1 Iteration 2 Progress: 0%
Phase 1 Iteration 3 Progress: 0%
Phase 1 Iteration 4 Progress: 0%
Phase 1 Iteration 5 Progress: 0%
Phase 1 Iteration 10 Progress: 0%
Phase 1 Iteration 15 Progress: 0%
Phase 1 Iteration 20 Progress: 1%
Phase 1 Iteration 25 Progress: 1%
Phase 1 Iteration 30 Progress: 1%
Phase 1 Iteration 35 Progress: 1%
Phase 1 Iteration 40 Progress: 1%
Error in solve.default(z$dfra) : 
  system is computationally singular: reciprocal condition number = 4.58224e-20
theta:  0.03416  0.01123 -0.01203 -0.00364 -0.17691 -0.40977  0.23908 -0.14365  0.25761  1.00000  0.21070 

Start phase 2.1
Phase 2 Subphase 1 Iteration 1 Progress: 14%
Phase 2 Subphase 1 Iteration 2 Progress: 14%
theta  0.04034  0.01130 -0.01206 -0.00342 -0.17012 -0.40569  0.24425 -0.13712  0.25683  0.99919  0.20914 
ac 1.063 1.049 1.006 1.044 1.025 1.063 1.067 1.065 0.651 0.954 0.866 
Phase 2 Subphase 1 Iteration 3 Progress: 14%
Phase 2 Subphase 1 Iteration 4 Progress: 14%
theta  0.05223  0.01144 -0.01213 -0.00299 -0.15670 -0.39786  0.25405 -0.12452  0.25377  0.99722  0.20489 
ac 1.136 1.112 1.013 1.096 1.105 1.134 1.161 1.137 0.690 0.984 0.881 
Phase 2 Subphase 1 Iteration 5 Progress: 14%
Phase 2 Subphase 1 Iteration 6 Progress: 14%
theta  0.06332  0.01158 -0.01221 -0.00256 -0.14449 -0.39056  0.26230 -0.11261  0.24601  0.99419  0.19779 
ac 1.137 1.140 0.936 1.145 1.104 1.136 1.164 1.140 0.863 0.962 0.967 
Phase 2 Subphase 1 Iteration 7 Progress: 14%
Error in x$FRAN(zsmall, xsmall) : 
  Unlikely to terminate this epoch:  more than 1000000 steps
Calls: siena07 ... proc2subphase -> doIterations -> <Anonymous> -> .Call
Execution halted



Jennifer N. Victor
Assistant Professor of Political Science
University of Pittsburgh
4600 Posvar Hall
jnvictor at pitt.edu
(412) 624-7204