Dear all,
 
I simple query from a simple mind. Please humour me.
 
I recently (possibly foolishly) updated my lme4 package. I have lots of code which calls lmer2. I understand that lmer2 is now deprecated so these calls produce an equivalent call to lmer. However, lmer2 accepted zero weights whilst lmer appears not to ("Error in lmerFrames(mc, formula, contrasts) : negative weights or weights of zero are not allowed"). Is this correct? Is there a reason for this difference?
 
Many thanks for any assistance.
 
Richard

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