If you wanted to edit the value of the first row in C1096 to be the value 1.234 then you could use the edit command as follows:

Code: Select all

```
NOTE put the value 1.234 into the first row of C1096
EDIT 1 C1096 1.234
```

If instead you wanted to enter values for a whole column at once you could use the JOIN command as follows:

Code: Select all

```
NOTE replace contents of C1096 with the row values 1.234 2.345 3.456 4.567
JOIN 1.234 2.345 3.456 4.567 C1096
```

Alternatively if you wanted to append to the column instead of replacing it with new values you might do something like:

Code: Select all

```
NOTE append the value 1.234 to column C1096
JOIN C1096 1.234 C1096
```

Regarding chain convergence, the test would be that the parameter values with different starting values have more of less the same values and standard deviations, as well as the chain being stable. If you look in the Model->trajectories window you can find the MCMC chain for each parameter, and clicking on these chains will provide additional diagnostic statistics.

What surprises me a bit about the error message that you are getting is that you only appear to have one variance at each level, so I am not sure of which matrix inversion it is referring to. Are any of the fixed parameter estimates zero for the second IGLS model, if so the problem may be there?