How to handle Nas in Lme4

I am using lme4 R package, but I have NA values in data. I am running the command given below (where, Rtot contains some NaN values.)

 event_lme <- lmer(Rtot ~1 + (1 |EQID))
  

Rtot contains some NaN values.

When I run this it gives me this error :

"Error in KhatriRao(sm, t(mm)) : (p <- ncol(X)) == ncol(Y) is not TRUE"

I don't want to drop NA values. Ultimately I am looking for ranef(event_lme) which will have NA values at appropriate places.

Here is a subset of my data

Rtot	EQID
NA	127
NA	30
0.058011	151
NA	127
0.5780	1135
0.3306	127
First	1135
0.208	1039
0..057	30

Please advise how to resolve this.

Thanks