Hello,
I am using teffects to analyze the effect of individual patient variables on hospital length of stay, with my outcome variable of length of stay being called "losSUM".
teffects produces the error message "outcome variable losSUM must contain nonnegative integers", even though I have no negative values in that variable.

.codebook losSUM produces the following, which shows all positive values. Note, that I've :
range: [.016, 103.63055] units: 1.000e-09

I'd appreciate any advice on how to understand this perplexing error message.