Fix typo in error message
Check for duplicated level names in factors in MxData
Simple category collapsing for mxFactor
Change mxStandardizeRAMpaths() to say if the model hasn't been run yet; amend test model accordingly.
Added argument defvar.row=1 to mxEvalByName()
Add mxMakeNames & test
Progress toward making WLS safe.
Add eval by name wrapper for mxEval created by Spiegel
Throw warning from ref models when definition variables are present. It could be changed to an error if there is a helpful solution.
Cope with zero length components in mxSimplify2Array