Checking a (new) package - examples require other package functions

After adding the right functions to the NAMESPACE file, I am now getting a different error:

Error: package/namespace load failed for 'REEMtree'
Call sequence:
2: stop(gettextf("package/namespace load failed for '%s'", libraryPkgName(package)), 
       call. = FALSE, domain = NA)
1: library(package, lib.loc = lib.loc, character.only = TRUE, verbose = FALSE)
Execution halted

I have attached the NAMESPACE file in case that is where the problem is.  

Thanks again for your help!

Rebecca


----- Original Message -----
From: "Duncan Murdoch" <murdoch at stats.uwo.ca>
To: "Rebecca Sela" <rsela at stern.nyu.edu>
Cc: "r-help" <r-help at r-project.org>
Sent: Thursday, May 14, 2009 6:57:21 AM GMT -05:00 US/Canada Eastern
Subject: Re: [R] Checking a (new) package - examples require other package functions

I am creating an R package.  I ran R CMD check on the package, and everything passed until it tried to run the examples.  Then, the result was:

* checking examples ... ERROR
Running examples in REEMtree-Ex.R failed.
The error most likely occurred in:

### * AutoCorrelationLRtest

flush(stderr()); flush(stdout())

### Name: AutoCorrelationLRtest
### Title: Test for autocorrelation in the residuals of a RE-EM tree
### Aliases: AutoCorrelationLRtest
### Keywords: htest tree models

### ** Examples

# Estimation without autocorrelation
simpleEMresult<-RandomEffectsTree(Y~D+t+X, data=simpleREEMdata, random=~1|ID, simpleREEMdata$ID)

Error: couldn't find function "RandomEffectsTree"
Execution halted


The function "RandomEffectsTree" is defined in the R code for the package.  How can I refer to other functions from the package in examples?  (I have the "Writing R-extensions" PDF, so it would be enough to point me to the right page, if the answer is in there and I just missed it.)

You should not need to do anything special to make package functions 
visible, as long as they would be visible to a normal user.  (Functions 
not exported in the NAMESPACE file won't be visible in the examples.)

Are you sure you have a function with that exact name?  It could be a 
typo somewhere, e.g. RandomEffectTree or RandomeffectsTree.

Duncan Murdoch