Attempt to dereference a null object - get the value of a custom setting

Question

I try to access the value of a custom setting : this custom setting contains only one field Nombre__cand the name of the custom setting is Limit__c.

In apex I try to get the field Nombre__c :

Limit__c limite = Limit__c.getInstance('limit');
Integer nb = integer.valueOf(limite.Nombre__c);

There is only one value in this custom setting, named "limit" with a value in the field Nombre__c.

When I run my code I got this error

Attempt to de-reference a null object in the logs.

Answer 1

Here are possibilities what could be wrong:

1. Limit__c limite = Limit__c.getInstance('limit');

May be limite variable is null as there was no custom setting record where name was 'limit'. If this is true syntax limite.Nombre__c will throw null pointer exception as you can not refer Nombre__c of null. So put a debug like

System.debug('limite==='+limite);

2. In case point 1 above do not apply it may be the case value limite.Nombre__c is null It means there is a valid custom setting record with name as 'limit' but there is no value stored in Nombre__c field of that record.

   For this case try debugging

System.debug('limite.Nombre__c==='+limite.Nombre__c);

One of the above point will be true for your case.