i’m using the rms package and the lrm fucntion. When I try to use summary(fit), I keep getting the following error:

Error in reformulate(attr(termobj, “term.labels”)[-dropx], response = if (keep.response) termobj[[2L]], :
‘termlabels’ must be a character vector of length at least one
In addition: Warning message:
Using formula(x) is deprecated when x is a character vector of length > 1.
Consider formula(paste(x, collapse = ” “)) instead.

my datadist is defined and working, anyone know what could be causing this?

I’ve tried just about everything. Datadist is working fine, I have no missing data. All my continuous and categorical variables are working as they should.

fit_simple <- lrm(ninety_alive ~ + Population + Age + Fiscal_Year_cats, data = data)

> summary(fit_simple)

Error in reformulate(attr(termobj, "term.labels")[-dropx], response = if (keep.response) termobj[[2L]],  : 
  'termlabels' must be a character vector of length at least one
In addition: Warning message:
Using formula(x) is deprecated when x is a character vector of length > 1.
  Consider formula(paste(x, collapse = " ")) instead.