I am using the bulk API to fetch leads from Salesforce. The SObject Lead has, among others, the default field Fax and MobilePhone. However, the following query fails:

SELECT Name,Fax,MobilePhone FROM Lead

with the following error:

[Error: InvalidBatch : Failed to process query: INVALID_FIELD:  SELECT Name,Fax FROM Lead             ^ ERROR at Row:1:Column:13 No such column 'Fax' on entity 'Lead'. If you are attempting to use a custom field, be sure to append the '__c' after the custom field name. Please reference your WSDL or the describe call for the appropriate names.]

Why can't i query these fields although they appear as standard fields under Customize -> Leads -> Fields?

 

I am using the bulk API to fetch leads from Salesforce. The SObject Lead has, among others, the default field Fax and MobilePhone. However, the following query fails:

SELECT Name,Fax,MobilePhone FROM Lead

with the following error:

[Error: InvalidBatch : Failed to process query: INVALID_FIELD:  SELECT Name,Fax FROM Lead             ^ ERROR at Row:1:Column:13 No such column 'Fax' on entity 'Lead'. If you are attempting to use a custom field, be sure to append the '__c' after the custom field name. Please reference your WSDL or the describe call for the appropriate names.]

Why can't i query these fields although they appear as standard fields under Customize -> Leads -> Fields?