Linker error: Do I have a duplicate class name?

[Paul E Johnson]

I'm working to recode an older Swarm 1.05 program for the current Swarm.
It is a variant of Bank, for which I found a current version in Swarm
ftp (it compiles).  I found many changes to make in the older code, but
I'm stumped by this error at the end of the compilation. What does it
mean?

FNet.o: In function `global constructors keyed to FNet.msaUsga':
/swarm/otherPeopleCode/LunaBook/Ch6/FNet.m:14: multiple definition of
`global constructors keyed to FNet.msaUsga'
FNet.o:/swarm/otherPeopleCode/LunaBook/Ch6/FNet.m:14: first defined here
FNet.o: In function `global constructors keyed to FNet.msaUsga':
/swarm/otherPeopleCode/LunaBook/Ch6/FNet.m:14: multiple definition of
`__objc_class_name_FNet'
FNet.o:/swarm/otherPeopleCode/LunaBook/Ch6/FNet.m:14: first defined here

The FNet class nothing, literally:

FNet.h:

#import <simtools.h>
#import <graph.h>

@interface FNet: DiGraph {
}

@end

FNet.m:

#import "FNet.h"

@implementation FNet

@end


-- 
Paul E. Johnson                       email: address@hidden
Dept. of Political Science            http://lark.cc.ukans.edu/~pauljohn
University of Kansas                  Office: (785) 864-9086
Lawrence, Kansas 66045                FAX: (785) 864-5700

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