[ERROR] Unable to get socket name. Why?

[Ma Xiaoming]

Dear all,

I can compile the following code, but when I want to run the RunServer.exe, 
I got this error:

"RunServer[5996] unable to get socket name"

Could you please teach me how to get rid off this error? Thanks in advance.

-----------------------------------------
The Make File, save with name GNUmakefile
----------------------------------------- 

include $(GNUSTEP_MAKEFILES)/common.make

TOOL_NAME = RunServer
RunServer_OBJC_FILES = Server.m

include $(GNUSTEP_MAKEFILES)/tool.make



--------------------
TelephoneDirectory.h
--------------------

#ifndef _TELEPHONE_DIRECTORY_H_
#define _TELEPHOHE_DIRECTORY_H_

@protocol TelephoneDirectory

- (char *) teleNumber: (char *)personName;

@end

#endif /* _TELEPHONE_DIRECTORY_H_ */



--------
Client.m
--------

#include <Foundation/Foundation.h>

/* Include the TelephoneDirectory.h protocol header file */
#include "TelephoneDirectory.h"

/*
 * Declare the TelephoneDirectory class that
 * implements the 'teleNumber' instance method.
 */
@interface TelephoneDirectory : NSObject <TelephoneDirectory>
@end

/*
 * Define the TelephoneDirectory class
 * and the instance method (teleNumber).
 */
@implementation TelephoneDirectory : NSObject

- (char *) teleNumber: (char*) personName
{
    if (strcmp(personName, "Jack") == 0)
        return " 0123 456";
    else if (strcmp(personName, "Jill") == 0)
        return " 0456 789";
    else
        return " Number not found";
}

@end

/*
 * The main() function: Set up the program
 * as a 'Distributed Objects Server'.
 */
int main(void)
{
    /*
     * Remember, create an instance of the
     * NSAutoreleasePool class.
     */
    CREATE_AUTORELEASE_POOL(pool);

    /* Declare and define the teleponeDirectory object */
    TelephoneDirectory *teleDirectory = [[TelephoneDirectory alloc] init];

    /*
     * Create a mew socket port for your connection.
     */
    NSSocketPort *port = [NSSocketPort port];

    /*
     * Create a connection using the socket port.
     */
    NSConnection *connXion = [NSConnection connectionWithReceivePort: port
                              sendPort: port];

    /*
     * Set the responding server object to be
     * the root object for this connection.
     */
    [connXion setRootObject: teleDirectory];

    /*
     * Try to register a name for the NSConnection,
     * and report an error if this is not possible.
     */
    if ([connXion registerName: @"DirectoryServer"
         withNameServer: [NSSocketPortNameServer sharedInstance]] == NO)
    {
        NSLog(@"Unable to register as 'DirectoryServer'");
        NSLog(@"Perhaps another copy of this program is running?");
        exit(1);
    }
    else
        NSLog(@"\n** Managed to register connection as 'DirectoryServer' 
**\n");

    /* Start the current runloop. */
    [[NSRunLoop currentRunLoop] run];

    RELEASE(pool);
    return 0;
}

-------------------------

Best regards,

Xiaoming