Multiple linear regression error

[MTKEnter]

I am a little rusty but am trying to create a linear regression model to forecast sales but keep running into some road blocks so thought I'd come here for help instead of spinning my wheels.

I have a lot of independent variables in my file, but when I run model below I get error message saying unexpected '=' in model1 and I am not sure how to fix it?

model1 <-
lm(Finaldf$Actual Sales ~ data = Finaldf[,c(4,5,7:63)])

[FJCC]

If you want to fit Actual Sales against all the other variables, try

model1 <- lm(`Actual Sales` ~ .,  data = Finaldf[,c(4,5,7:63)])

[MTKEnter]

Thanks for your response. When I tried that I got the following error message below. Any thoughts?

Error in contrasts<-(*tmp*, value = contr.funs[1 + isOF[nn]]) :
contrasts can be applied only to factors with 2 or more levels

[FJCC]

It seems at least one of your columns has only one value. Exclude those columns from the data set.

[MTKEnter]

Thank you, that worked!