OpenMx General Help

> model2 <- mxModel(model1, mxAlgebra(.5*CTf, name="CTDZf"))
> model2 <- mxRun(model2)
Running SameMZDZf
Error in runHelper(model, frontendStart, intervals, silent, suppressWarnings, :
BLAS/LAPACK routine 'DPOTRF' gave error code -4

> model2 <- mxModel(model1, mxAlgebra(.5 %x% CTf, name="CTDZf"))
> model2 <- mxRun(model2)
Running SameMZDZf
Warning message:
In model 'SameMZDZf' NPSOL returned a non-zero status code 1. blah blah ...

yet
> mat <- matrix(rnorm(16), 4)
> .5 * mat == .5 %x% mat
[,1] [,2] [,3] [,4]
[1,] TRUE TRUE TRUE TRUE

I am trying to generate mxAlgebra expressions from a size variable. I have a variable amount of mx submodels and am trying to add the objectives from these together for a full model objective. I have tried things like
mxAlgebra(sum(get(paste("submodel",1:x,".objective",sep=""))),
name="TotObj")
and other various methods. I also tried the method described on
http://openmx.psyc.virginia.edu/thread/537
but don't think this will help in my particular situation.
Any suggestions?

Best,
-LLL

The Wiki says where to put the file, but not technically how to add the file to the directory.
Any help?

MZf <- mxModel(name="MZf", mxData(ObsCovMZf, type="cov", numObs=nMZf),
mxMLObjective(covariance='myModel.PreCovMZf'))
DZf <- mxModel(name="DZf", mxData(ObsCovDZf, type="cov", numObs=nDZf),
mxMLObjective(covariance='myModel.PreCovDZf'))
myModel1 <- mxModel(name="myModel", MZf, DZf)
myModel1

then run and compare:

MZf <- mxModel(name="MZf", mxData(ObsCovMZf, type="cov", numObs=nMZf),
mxMLObjective(covariance='myModel.PreCovMZf'))
DZf <- mxModel(name="DZf", mxData(ObsCovDZf, type="cov", numObs=nDZf),

VA <- mxMatrix(name="VA", type="Symm", nrow=5, ncol=5)
DZ <- mxAlgebra(.5 %x% VA, name="covDZA")
test <- mxModel(model="test", VA, DZ )
test
names(test)
rm1 <- mxModel(test, test@matrices$VA, remove=TRUE)
rm2 <- mxModel(test, test@algebras$covDZA, remove=TRUE)
rm3 <- mxModel(test, test@algebras$DZ, remove=TRUE)

why doesn't remove=TRUE work with rm1 and rm2 while it fails to throw an error or warning with rm3?