Error in eval(predvars, data, env) : object 'Treatment' not found

model.oneway<-lm(Bulkdensity~Treatment)
Error in eval(predvars, data, env) : object 'Treatment' not found

Can someone help me with this? I can´t understand why R can´t find the object "Treatment". I have defined it as a factor and the text file looks fine.

Is Treatment an object currently in your RSession that you create earlier in your script ?

I solved it! Stupid mistake. Had forgot to specify data=

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