Error creating Live CD : Unable to download from repo : failure: Packages/*******.rpm from dev: [Errno 256] No more mirrors to try.

[Joshua C.]

I randomly get this error when using local repos:
Error creating Live CD : Unable to download from repo : failure:
Packages/***bla***.x86_64.rpm from dev: [Errno 256] No more mirrors to
try.
But the package is there.