Error in eval(predvars, data, env) : invalid ‘envir’ argument of type ‘character’

Use load directly

load("C:\\pathToRDA\\swiss.RDA")
#Assuming the dataset inside swiss.RDA is called swiss
simple.fit = lm(formula = VoteYes ~ age, data=swiss)

dataset = load("C:\\pathToRDA\\swiss.RDA") will create a varible in the Values section called dataset in your Global env with a string vlaue “swiss”.

For example:

mtest = mtcats
save(mtest, file = "mt.rda")
mtc = load("~/mt.RDA") #Will create variable called mtc = "mtest" in Values in Global env.  
load("~/mt.RDA") #loads the mtest dataset

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