OpenMx General Help

Should the degrees of freedom depend on how the data are input?
Here is the output for the raw data:
observed statistics: 120
estimated parameters: 9
degrees of freedom: 111
-2 log likelihood: 894.0595
saturated -2 log likelihood: NA
number of observations: 20
chi-square: NA
p: NA
AIC (Mx): 672.0595
BIC (Mx): 280.7666

Obtaining fit indices (CFI, RMSEA, etc.) with FIML
Here's the output from my model:
observed statistics: 276
estimated parameters: 23

Versions 0.9.0 vs. 0.5.2
I am fitting some variance known models (akin to meta-analysis). To handle models with possible covariates, I use a RAM model. The results based on 0.5.2 are comparable to those based on other statistical packages. After upgraded to 0.9.0, the results look odd.
The followings are an example. The -2LL of the 0.5.2 and 0.9.0 versions are 27.79916 and 29.02565, respectively. Any suggestions are highly appreciated. Thanks.
Regards,
Mike
yi <- c(-0.264,-0.230,0.166,0.173,0.225,0.291,0.309,0.435,0.476,0.617,0.651,0.718,0.740,0.745,0.758,0.922,0.938,0.962,1.522,1.844)
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what's the estimator in OpenMx?
I'm a new learner of OpenMX and R , I want to use it to do simple SEM analysis, but I can't find the estimator information in OpenMxUserGuide. please tell me how can I find and how can I understand the estimator in OpenMx .
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parameters of 1 factor factor examples
http://openmx.psyc.virginia.edu/2010/08/openmx-050
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Should version 0.5 be slower on some models?

Jacobian matrix
I am trying to implement the Satorra-Bentler robust standard error. It requires the Jacobian matrix in the calculations. Apparently, the Jacobian matrix is called "cJac" in npsolWrap.c. I would like to see whether it is possible to access "cJac" in OpenMx. Thanks in advance.
Regards,
Mike
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Can you give me simple, self contained working examples for testing parallel OpenMX

How to cite OpenMx?
Thanks,
Sanja
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Trying a LISREL example in OpenMx
I've reproduced the LISREL sample below and my translation to OpenMx based on reading the beginners section in the help. The error message I get is:
"Error: The job for model 'ex6' exited abnormally with the error message: Backing out of parameter space region where expected covariance is non-positive-definite."
I'm probably doing something silly here. Any help much appreciated!
======= lisrel code ========
Stability of Alienation
Observed Variables
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