


Hello,
 I've been working with the package of bioconductor Agi4x44PreProcess, 
but reads data error says "Error in` [. Data.frame `(obj,, columns 
[[a]]): undefined columns selected"

My file is targets.txt:


FileName    Treatment    GErep    Subject    Array

1.txt                       ISO            1          Subj      1
2.txt                       ISO            2          Subj      1
3.txt                       ISO            1          Subj      1
4.txt                       ISO            2          Subj      1

And un example of head of 1.txt
file is
FEATURES    FeatureNum    Row    Col    accessions    chr_coord    SubTypeMask    SubTypeName    ProbeUID    ControlType    ProbeName    GeneName    SystematicName    Description    PositionX    PositionY    gSurrogateUsed    gIsFound    gProcessedSignal    gProcessedSigError    gNumPixOLHi    gNumPixOLLo    gNumPix    gMeanSignal    gMedianSignal    gPixSDev    gPixNormIQR    gBGNumPix    gBGMeanSignal    gBGMedianSignal    gBGPixSDev    gBGPixNormIQR    gNumSatPix    gIsSaturated    gIsLowPMTScaledUp         gIsBGNonUnifOL    gIsFeatPopnOL    gIsBGPopnOL    IsManualFlag    gBGSubSignal    gBGSubSigError    gIsPosAndSignif    gPValFeatEqBG    gNumBGUsed    gIsWellAboveBG    gBGUsed    gBGSDUsed    ErrorModel    gSpatialDetrendIsInFilteredSet    gSpatialDetrendSurfaceValue    SpotExtentX    SpotExtentY    gNetSignal    gMultDetrendSignal    gProcessedBackground    gProcessedBkngError    IsUsedBGAdjust    gInterpolatedNegCtrlSub    gIsInNegCtrlRange    gIsUsedInMD                                                                                                                        
Tab-separated
           
 

 		 	   		   		 	   		  
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