Help with RAR Files

[james Tallett]

Hello,

I have been sent a file containing several smaller files with the rar ext at the end, when I try ad extract them using WINRAR I get the following error -

1 1-2.rar: Unknown method in cfn-cm4.011
2 1-2.rar: No files to extract

I seem to always get similar error messages, can anyone help please as it is really frustrating.

Thanks in Advance

James