Greetings all,

Now finally getting Mx to work on my Mac, I'm having a good time putting it through its paces. So, I have a simple model I'm playing with

probsolv -> grades -> irtsci

Below is the syntax and output. It's reading the number of obs correctly and the estimates seem correct. However, I am not getting a value for the LR chi-square test nor the RMSEA and the df seem fairly large considering it should only be 1 df. Thanks in advance. David

--------

>

> sciach
>

> require(OpenMx)

>

> #data(sciach)

>

> sciachsimple
>

> manifests
>

> pathmodel
+ mxData(observed=sciachsimple,type="raw"),

+ manifestVars = manifests,

+

+ mxPath(from="probsolv", to="grades",arrows=1,free=TRUE),

+

+ mxPath(from="grades", to="irtsci",arrows=1,free=TRUE),

+

+ mxPath(from=c("probsolv", "grades", "irtsci"),

+ arrows=2,

+ free=TRUE,

+ values = c(1, 1, 1),

+ labels=c("varx", "residual1", "residual2")),

+

+ mxPath(from="one",

+ to=c("probsolv", "grades", "irtsci"),

+ arrows=1,

+ free=TRUE,

+ values=c(1, 1, 1),

+ labels=c("meanx","beta0grades", "beta0irtsci")))

>

>

>

> pathmodelfit
Running path model

> # pathmodelfit@output

>

> summary(mxRun(pathmodel))

Running path model

irtsci grades probsolv

Min. : 4.98 Min. :0.000 Min. : 0.00

1st Qu.:10.90 1st Qu.:2.000 1st Qu.: 7.00

Median :14.50 Median :3.000 Median : 9.00

Mean :14.69 Mean :2.858 Mean : 9.01

3rd Qu.:18.80 3rd Qu.:3.500 3rd Qu.:12.00

Max. :24.90 Max. :4.000 Max. :15.00

name matrix row col Estimate Std.Error

1

2

3 residual2 S irtsci irtsci 21.36742233 0.88520752

4 residual1 S grades grades 0.80461695 0.03333778

5 varx S probsolv probsolv 12.98102667 0.53787536

6 beta0irtsci M 1 irtsci 8.58666103 0.44305855

7 beta0grades M 1 grades 2.37100192 0.07077779

8 meanx M 1 probsolv 9.00943610 0.10555834

Observed statistics: 3495

Estimated parameters: 8

Degrees of freedom: 3487

-2 log likelihood: 16218.66

Saturated -2 log likelihood: NA

numObs: 1165

Chi-Square: NA

p: NA

AIC (Mx): 9244.662

BIC (Mx): -4200.609

adjusted BIC:

RMSEA: NA

frontend time: 0.2014029 secs

backend time: 3.162092 secs

independent submodels time: 6.508827e-05 secs

wall clock time: 3.36356 secs

cpu time: 3.36356 secs

openmx version number: 0.2.9-1147