Hi everyone,

I have a small ChIP_Seq dataset with 6 samples (3  replicates each of WildType and Knockout). I wanted to do a differential binding analysis with ChipComp package. When i tried to execute the makeCountSet() function, it is giving me this error 

Making peak list......

Error in (function (classes, fdef, mtable)  : 
  unable to find an inherited method for function ‘import’ for signature ‘"NULL", "missing", "missing"’

What does this mean and how do i fix this ?

Thanks,
Apoorva