Re: duplicate interface error (solved)

FROM : Daniel Child
DATE : Fri Feb 15 23:51:47 2008

Looking at the file paths, I saw that one set of files was referenced 
(not copied) from another project.

That was in turn referencing a duplicate of GenericRecord in that 
other project. Copied the reference, and copied the file. Now all is 
fine.

The "missing" "DataTypes.h" file was then reported as missing (as 
expected), so I copied it back in.

Problem resolved....

On Feb 15, 2008, at 5:15 PM, Daniel Child wrote:

> Hi,
>
> I was trying to implement the NSCopying protocol for one of my 
> classes, and the next time i compiled I got these two warnings/errors:
>
> warning: duplicate interface declaration for class 'GenericRecord'
> error: redefinition of 'struct GenericRecord'
>
> The errors are cited within a file that imports the GenericRecord 
> class.
>
> The interface (and there is only one that I know of) looks harmless 
> enough:
>
> @interface GenericRecord : NSObject <NSCopying>
> {
> <<ivars>>
> }
> ....
> - (GenericRecord *) copyWithZone: (NSZone *) zone;
>
> Earlier in the day XCode claimed that I had a duplicate 
> "DataTypes.h" file (where I keep some enum definitions and 
> functions). I removed the only visible one from the Groups & Files 
> list (being sure to make a safe copy elsewhere of the contents 
> elsewhere). Now things compile fine, but looking at Groups & Files 
> it looks to me like the file ought to be considered missing.
>
> There appears to be some kind of ghost in the machine, and I have 
> no idea where to look. I was originally working with smaller 
> programs from which some of these files were copied (copy reference 
> and file when adding). But I don't see why this is suddenly a 
> problem now and have no idea how to fix it.
>
> Thanks in advance.
>
> Daniel