Greetings all,

I finally was able to get OpenMx going on my Mac. I am reading in some data and estimating a very small path model, just to get the hang of things. The syntax is

sciach

require(OpenMx)

#data(sciach)

manifests

sciachsimple

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 pathmodelfit@output

summary(mxRun(pathmodel))

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The error message I'm getting is

Error: The column name 'challeng' in the observed covariance matrix of the FIML objective function in model 'path model' cannot be found in the dimnames of the data.

> pathmodelfit@output

Error: object 'pathmodelfit' not found

>

> summary(mxRun(pathmodel))

Running path model

Error: The column name 'challeng' in the observed covariance matrix of the FIML objective function in model 'path model' cannot be found in the dimnames of the data.

Error in summary(mxRun(pathmodel)) :

error in evaluating the argument 'object' in selecting a method for function 'summary'

----------

The variable "challeng" is in the sciach dataset but I thought I correctly selected only the variables I wanted using the line sciachsimple

Thoughts?

Thanks in advance.

David