Dear Bioconductors, I tried to get the quality control report generated by affyQCReport. But I failed. This is my code: library(affy); Tucson_Array <-ReadAffy(); library(affyQCReport); QCReport(Tucson_Array, file="TucsonQC.pdf"); This is the error message: error density.default(newX[, i], ...) : 'x' contains missing values Warning message: duplicate row.names 12,15,20,21,22,25,26,27,31,32,33,34,38,39,40,43,44,45,48,49,50,54,55,5 9,60,64,65,69,70,73,74,75,78,79,83,84,88,89,90,94,95,96,97,100,101,102 ,106,107,108,110,111,112,114,116,117,118,119,120,121,122,125,127,131,1 32,135,136,139,142,143,144,146,147,148,149,151,152,154,156,158,159,160 ,161,162,165,167,168,171,172,173,179,180,181,182,183,184,187,190,191,1 96,197,198,199,205,206,207,208,211,213,217,218,219,221,222,224,227,228 ,230,232,234,237,238,241,242,246,249,252,253,254,255,257,259,260,263,2 64,266,267,269,270,271,273,275,276,279,281,283,285,288,292,294,296,298 ,301,304,307,309,310,312,315,316,317,321,324,326,329,332,333,334,336,3 39,341,343,345,346,348,351,352,353,354,357,358,360,367,369,370,372,373 ,375,376,378,381,383,384,385,386,388,389,391,392,394,395,397,400,403,4 04,405,407,410,412,415,419,421,424,426,427,429,430,432,434,436,437,439 ,441,443,446,449,452,454,456,457,458,461,465,468,470,471,472,474,475,4 77,480,483,486,490,491,493,495,498,501,504,506,507,509,510,512,513,5 [... truncated] in: data.row.names(row.names, rowsi, i) How can I do for next step to deal with the missing value and duplicate row.names? Thanks in advance. Yisong PS. And here is, sessionInfo() R version 2.5.0 (2007-04-23) i686-redhat-linux-gnu locale: LC_CTYPE=zh_CN.GB18030;LC_NUMERIC=C;LC_TIME=zh_CN.GB18030;LC_COLLATE=z h_CN.GB18030;LC_MONETARY=zh_CN.GB18030;LC_MESSAGES=zh_CN.GB18030;LC_PA PER=zh_CN.GB18030;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT =zh_CN.GB18030;LC_IDENTIFICATION=C attached base packages: [1] "tools" "stats" "graphics" "grDevices" "utils" "datasets" [7] "methods" "base" other attached packages: cint06a520380fcdf affy affyio Biobase "1.14.0" "1.14.2" "1.4.1" "1.14.1" [[alternative HTML version deleted]]