[R] Read data in R

[Allie818]

I have a txt file with column data separated by commas.

Subject,Sessionblock,LotteryImg,SubjectResp,Pictime,Bidtime,Voltage,ForcedAns
10816,Session1,75_C2.jpg,No,7095,9548,Mid,Yes
10816,Session1,25_C1.jpg,No,16629,18130,Low,Yes
10816,Session1,5_C1.jpg,No,23217,24276,Low,Yes
10816,Session1,75_C1.jpg,NULL,36359,-66179,Low,Yes
10816,Session1,25_C2.jpg,NULL,49468,-66179,Mid,Yes
10816,Session1,75_C3.jpg,Yes,60602,62119,High,Yes

I have tried to read the data with this command
data<-read.table("/mrdata/embodied_val/data/Conditioning_TIM4_082310.txt",sep
= ",",header=T)

but I get this error 
Error in make.names(col.names, unique = TRUE) : 
  invalid multibyte string at '<ff><fe>C'

What am I doing wrong?

Thanks,
Alice
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