Applescript "Finder got an error: Can't make document file"

Question

I can get the file contents if I use choose file but if I do it this way, I get the error:
error "Finder got an error: Can’t make document file ... to file
Code:
tell application "Finder"
          set theFolder to (choose folder with prompt "Select the start folder")
          set file_list to every file of theFolder
          repeat with myfile in file_list
      log (name of myfile as string)
      set fileContents to read myfile
      set fileText to paragraphs of (fileContents)
      repeat with nextLine in fileText
          if length of nextLine is greater than 0 then
              log nextLine
          end if
      end repeat
          end repeat
end tell

Answer 1

Changing
set fileContents to read myfile
to
set fileContents to read (myfile as alias)
sorted it!