[Lazarus] Can't find unit contnrs used by Masks

[Marco van de Voort]

On Fri, Dec 03, 2010 at 02:09:52PM +0100, Michael Schnell wrote:
> "Recompiling contnrs, checksum changed for System
>    masks.pas(29,22) Fatal: Can't find unit contnrs used by Masks"
> 
> Since many weeks I get this error when trying to recompile the newest 
> svn version of Lazarus with the newest svn Version of FPC.
> 
> I remember that I once had this problem and it was solved by using a 
> more recent FPC.
> 
> Will this problem be solved with a later version of either Lazarus or 
> FPC or do I do something wrong ?

This means that you are mixing FPC and/or precompiled lazarus parts in
different versions.

IOW it is not a bug of the compiler, but a mistake in installing the system.