Dear Rune, R-Sig-ME list members,

I have question. I added a fixed effect, CondProb.post, to a model that was
working well, and
now I am getting an error message.

> fmm3.post <- clmm(orank~
+ l.resp.w4f +l.resp.t2f + l.respFreq + CondProb.post
+(1|subj)+(1|item),Hess=T,data=quad.post)

*Error in if (maxGrad < rho$ctrl$gradTol) { :
 missing value where TRUE/FALSE needed
In addition: Warning message:
In sqrt(phi2) : NaNs produced*

I am not sure what about this fixed effect is causing problems....

Here is the summary of it:

summary(quad.post$CondProb.post)
   Min. 1st Qu.  Median    Mean 3rd Qu.    Max.
-12.940  -7.259  -5.738  -5.699  -4.211   0.000

Thanks so much for your help,

Cyrus

-- 
http://www.ualberta.ca/~cshaoul/

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