[R-sig-ME] lme() - Error in recalc.corAR1

[Santosh Srinivas]

Dear List Recipients, Hope this email finds you well.

I am writing to request your help the below issue:
Error in recalc.corAR1(object[[i]], conLin): NA/NaN/Inf in foreign function call (arg 1)

This occurs when I run the following regression model:

m =
  lme(
    y ~ x,
    random = ~x|user_id,
    correlation = corAR1(form = ~1|user_id),
    weights = varExp(form = ~x),
    method = 'REML',
    na.action = na.omit,
    data = df)

I have uploaded the data here for reproducibility:
https://drive.google.com/file/d/1kA5-T4zZ-f33gJgAsJ9AWMlK-YXAm65m/view?usp=sharing

Request your help with how to understand and fix this ussue.

Thanks & regards
Santosh






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