Error message when the alternative contains spaces in its name

[ADucellierIHME]

I have encountered an issue when one of the alternative definitions is called "Name1 and Name2" in the initial data.table in R. At some point in CWData or CWmodel before we arrive at the computation of the relation matrix, the alternative definition has become ["Name1", "and", "Name2"], that is it looks that there are three alternatives instead of one. Then when we check the rank of the design matrix, the rank is too small and we get an error message.
Replacing the alternative name "Name1 and Name2" by "Name1_and_Name2" in the R data.table before creating the crosswalk data and model will solve the problem. However, we may want to correct that in the Python code.