[plt-scheme] To Racket...

Hello,

I am starting to convert my scheme software to racket. 
So I load my main.scm and start by getting an internal error:
,----
| ../../Applications/racket/collects/compiler/cm.rkt:178:11: cm: internal
| error?; cannot find sha1 for module: #<path:/localhome/pmatos/Code/eboc/modes/esmc-mode/search-sig.scm>
`----

I looked at cm.rkt and can't find any suspicious, except for... my
filename extension... -> scm
Do I need to rename my filenames to rkt?

It would be great to have a small guide saying what, in general, you
need to do to get your software running on racket.

Cheers,

-- 
PMatos