I'm getting the “Error in if (abs(x - oldx) < ftol)” after formatting data for my logit model

Question

It had worked previously but I've been having trouble with my packages on and off throughout the day, although maybe that has nothing to do with it. I had ran the code below earlier and it had worked. But for the past few hours I keep on getting the same error

“Error in if (abs(x - oldx) < ftol) { : missing value where TRUE/FALSE needed”

I'm trying to run a logit model without alternative specific constants (although I keep getting the same error regardless of the coefficients I'm trying to generate):

H<-mlogit.data(heat, choice="depvar", shape = "long",alt.levels=c("ec","er","gc","hp"))

m1<-mlogit(depvar ~ -1 + ic +gr + er +hp, H)
summary(m1)

I'd appreciate any pointers, thank you!

Answer 1

It was a syntax error when formatting the dataset...I was missing one of my alternate values and I suppose when I tried to execute the logit model it was reading rows of empty values it couldn't recognize...