OpenMx Error Messages

Hi All,

I am trying to fit the alternate forms comorbidity model with raw data. When I run the script (attached) I get the following error message:

Error: The entity 'MZExpectedFrequency' in model 'MZ' generated the error message: 'lbound' must have length equal to diag(covariance).

Any suggestions?

Cheers,
Jocilyn

I received this error when trying to run a latent growth curve model:

Error: The expected covariance matrix associated with the FIML objective in model 'MZ' is not of the same length as the dimnames provided by the objective function.

I used the traceback() function to try to determine the error and received the following output:

9: stop(msg, call. = FALSE)
8: updateObjectiveDimnames(.Object, job, model@name, "FIML")
7: genericObjModelConvert(flatObjective, job, model, namespace,
flatJob)
6: genericObjModelConvert(flatObjective, job, model, namespace,
flatJob)

I am trying the following (see code below) and getting this error:

Error: The name 'mPA', 'mPA', 'mPA', 'mPA', 'mPA', 'mPA', 'mPA', 'mPA', 'mPA', and 'mPA' is illegal because it contains multiple '.' characters in mxMatrix("Full", nrow = 1, ncol = numManifest, values = 0.05, free = TRUE, dimnames = list(NULL, manifests), name = c(rep("mPA", embedD), rep("mPA", embedD)))

What am I missing? As far as I can tell, the names do not have any punctuation symbols in them.
~ Angela

numManifest <- 10
manifests <- c(paste("pos",0:4,sep=""),paste("str",0:4,sep=""))
embedD <- 5

Hi, I haven't used OpenMx before, but I started by trying an example from the LISREL book (Joreskog & Sorbom).

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

Hello ~
I am getting an error that others have posted when using mxMatrix specification. Since a mxObjective statement is not required with mxPath specification (type="RAM"), I am unsure how to solve the problem. I have attached the script and data that are associated with the error. When I check rownames(), colnames(), and manifestVars names in R, I get the same list for each case.

Any thoughts?

Sincerely,
~ Angela

Hi there,

any clue why mxVersion should return this error
> mxVersion()
Error in mxVersion() : subscript out of bounds

I have not seen it before, and now get it after running the install script for OpenMx to update my library

Hi,

I'm wanting to add 3 covariates to a saturated model. One of them (age) seems to work fine, but when I try to use either of the other two individually (birthweight or gestation time), I get an error message:

> univTwinSatFit <- mxRun(univTwinSatModel)
Running univTwinSat
Error in mxRun(univTwinSatModel) :
Error NYI: Missing Definition Vars Not Yet Implemented.

I am running a trivariate model using a script from the workshop this year (thanks for that!) but keep getting the same error message. It comes when I try to run the Fit Multivariate ACE Model using Cholesky Decomposition portion of the script. The error message is as follows:

multACEFit <- mxRun(multACEModel)
Running multACE
Error in gzfile(file, mode) : cannot open the connection
In addition: Warning message:
In gzfile(file, mode) :

Hi Guys,

I ran a saturated model ok initially, but now I get these strange errors that vary in the reference each time I try to run it:

> multiTwinSatFit <- mxRun(multiTwinSatModel)
Running multiTwinSat
Error: The reference 'multiTwinSat.untitled131' is unknown in the algebra named 'Sibs.expVarSibL'
> multiTwinSatFit <- mxRun(multiTwinSatModel)
Running multiTwinSat
Error: The reference 'multiTwinSat.untitled197' is unknown in the algebra named 'Sibs.expVarSibL'
> multiTwinSatFit <- mxRun(multiTwinSatModel)
Running multiTwinSat