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Tevfik KaragulleTevfik Karagulle 

Data loader update doesn't really work on SOME fields.

Hi all,

We configure data loader to perform an update operation and gets a success result with the 'Item updated' message back. However, we can't see changes reflected at the web interface for some fields. Any idea what may blocking update operations ? What we observe that troubled fields are being used in various logic inside (triggering, picklist?). Other fields, insert and delete operations work as expected.

Hope that somebody can shed light on this weird behaviour.

Kind regards
Tev
Sai PraveenSai Praveen (Salesforce Developers) 
Hi Tevfix,

May be after dataloader update happened the trigger or any automation is updating those field to the initial values. You may need to turn off those logic and try to update using dataloader.

To confirm the same you can update manually for one record and see if the value is reverted to old value or not.

If this solution helps, Please mark it as best answer.

Thanks,
 
aparna kantuaparna kantu
Hii  Tevfix,
 Auto-Number fields, Formula fields, and External ID fields are read-only fields that can't be edited or created.
When updating or  importing records using Data Loader, some of the fields are not available for field mapping.Also Check the missing fields' Field Level Security by Profile or by Fields.
If the field is hidden, it will not be available via the Data Loader for mapping.
Field Level Security will grant a user access and visibility on that field. An administrator can modify the Field Accessibility and Permissions for the affected user's profile.
Thanks,