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In this talk, we introduce our recently completed next-to-leading order (NLO)global analysis of the nuclear parton distribution functions (nPDFs) calledEPS09 - a higher order successor to the well-known leading-order (LO) analysisEKS98 and also to our previous LO work EPS08. As an extension to similar globalanalyses carried out by other groups, we complement the data from deepinelastic $l+A$ scattering and Drell-Yan dilepton measurements in p+$A$collisions by inclusive midrapidity pion production data from d+Au collisionsat RHIC, which results in better constrained gluon distributions than before.The most important new ingredient, however, is the detailed error analysis,which employs the Hessian method and which allows us to map out theparameter-space vicinity of the best-fit to a collection of nPDF error sets.These error sets provide the end-user a way to compute how thePDF-uncertainties will propagate into the cross sections of his/her interest.The EPS09 package to be released soon, will contain both the NLO and LO resultsfor the best fits and the uncertainty sets.

EPS09 - Global NLO analysis of nuclear PDFs and their uncertainties