[OS X TeX] BibTeX problem with apa.cls and apacite.bst

[Olli Hardt]

hello:  when i typeset a file that uses \documentclass[...]{apa} and \usepackage{apacite} in the following sequence (TeXShop -- LaTeX run, BiBTeX run, LaTeX run, LaTeX run), i get an error after during the last run.  This error looks like as if the codes the BiBTeX generates to put the citations in the text have some problems.  the reference list is correctly typset.  what is the problem, and how can i prevent this error?  thanks for your help.  olli.
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