title: deconstructSigs error
body: <p>I am using the deconstructSigs package and when I try to convert the mutation list to the correct input format I get this error:</p>
  
  <blockquote>
    <p>Error in .local(x, ...) : 'start', 'end' and 'width' 
    can only be specified when 'names' is either missing, 
    a character vector/factor, a character-Rle, or a factor-Rle</p>
  </blockquote>
  
  <p>This is my code:</p>
  
  <pre><code>library(deconstructSigs)
  sigs.input &lt;- mut.to.sigs.input(mut.ref = data, 
                                  sample.id = "Gene_Symbol", 
                                  chr = "Chromosome", 
                                  pos = "Position", 
                                  ref = "Reference_Base", 
                                  alt = "Alternate_Base")
  </code></pre>
  
  <p>Does anyone know how to deal with it? Thanks in advance. </p>