Semantic Issue 'Property 'X' not found on object of type 'x'

Objective-C Programming (2nd Edition) 21. Object Instance Variables and Properties
1

I am getting this error on my heightInMeters, weightInKilos, label and resaleValue setters. The error says 'Semantic Issue property X is not found on object of type BNREmployee. My code is below. I would be grateful for anyone to look through it and give me a solution or if anyone could share their code. Thanks.

main.m

[code]#import <Foundation/Foundation.h>
#import “BNRAsset.h”
#import “BNREmployee.h”
#import "BNRPerson.h"
int main(int argc, const char * argv[])
{

@autoreleasepool {
    
    //create an array of BNREmployee objects
    NSMutableArray *employees = [[NSMutableArray alloc]init];
    
    for (int i = 0; i < 10; i++) {
        //Create an instance
        BNREmployee *mikey = [[BNREmployee alloc]init];
        
        //Give values to the variables
        mikey.weightInKilos = 90 + 1;
        mikey.heightInMeters = 1.8 - i/10.0;
        mikey.employeeID = i;
        
        //Put in the array
        [employees addObject:mikey];
    }
    
    //Creat 10 assets
    for (int i = 0; i < 10; i++) {
        //Create an asset
        BNREmployee *asset = [[BNRAsset alloc]init];
        
        NSString *currentLabel = [NSString stringWithFormat:@"Laptop %d", i];
        asset.label = currentLabel;
        asset.resaleValue = 360 + i * 17;
        
        //Create a random number between 0-9 inclusive
        NSUInteger randomIndex = random() % [employees count];
        
        //Find that employee
        BNREmployee *randomEmployee = [employees objectAtIndex:randomIndex];
        
        //Assign the asset to the employee
        [randomEmployee addAsset:asset];
    }
    
    NSLog(@"Employees %@", employees);
    
    NSLog(@"Giving up ownership of one employee");
    
    [employees removeObjectAtIndex:5];
    
    NSLog(@"Giving up ownership of arrays");
    
    employees = nil;
    
    
}
return 0;

}

[/code]

BNRPerson.h

#import <Foundation/Foundation.h>

@interface BNRPerson : NSObject

@property (nonatomic) float heightInMeters;
@property (nonatomic) int weightInKilos;

    //BNRPerson has a method that calculates the Body Mass Index
    - (float)bodyMassIndex;


@end

BNRPerson.m

[code]#import “BNRPerson.h”

@implementation BNRPerson

  • (float)bodyMassIndex
    {
    float h = [self heightInMeters];
    return [self weightInKilos] / (h * h);
    }

@end[/code]

BNREmployee.h

@interface BNREmployee : NSObject



@property (nonatomic) unsigned int employeeID;
@property (nonatomic) NSDate *hireDate;
@property (nonatomic, copy) NSArray *asset;
- (double)yearsOfEmployment;
- (void)addAsset:(BNRAsset *)a;
- (unsigned int)valueOfAssets;



@end[/code]

BNREmployee.m
[code]#import "BNREmployee.h"
#import "BNRAsset.h"

@interface BNREmployee ()

{
    NSMutableArray *_assets;
}
@property (nonatomic) unsigned int officeAlarmCode;

@end


@implementation BNREmployee

//Accessors for assets properties
- (void)setAssets:(NSArray *)a
{
    _assets = [a mutableCopy];
}

- (NSArray *)assets
{
    return [ _assets copy];
}

- (void)addAsset:(BNRAsset *)a
{
    //Is assets nil?
    if (!_assets) {
        //create the array
        _assets = [[NSMutableArray alloc]init];
    }
    [_assets addObject:a];
}

- (unsigned int)valueOfAssets
{
    //Sum up the resale value of the assets
    unsigned int sum = 0;
    for (BNRAsset *a in _assets){
        sum += [a resaleValue];
    }
    return sum;
}

- (double)yearsOfEmployment
{
    if (self.hireDate) {
        NSDate *now = [NSDate date];
        NSTimeInterval secs = [now timeIntervalSinceDate:self.hireDate];
        return secs / 31557600.0;
    } else {
        return 0;
    }
}
- (float)bodyMassIndex
{
    float normalBMI = [super bodyMassIndex];
    return normalBMI * 0.9;
}

- (NSString *)description
{
    return [NSString stringWithFormat:@"<Employee %d: $%d in assets>", self.employeeID, self.valueOfAssets];
}

- (void)dealloc
{
    NSLog(@"deallocating %@", self);
}

@end

BNRAsset.h

#import <Foundation/Foundation.h>
#import "BNREmployee.h"

@interface BNRAsset : NSObject

@property (nonatomic, copy) NSString *label;
@property (nonatomic) unsigned int resaleValue;

@end

BNRAsset.m

#import "BNRAsset.h"

@implementation BNRAsset

- (NSString *)description
{
    return [NSString stringWithFormat:@"<%@: $%d>", self.label, self.resaleValue];
}

- (void)dealloc
{
    NSLog(@"deallocating %@", self);
}

@end