I have defined a custom field for a particular case type ("adhesion") it's a yes or no field that I need to update when I finish the processing. So I use the Case API to update it passing the id and the new value for the custom field. But this doesn't update the value I get this as a return in the API explorer. I was able to update custom fields in others entities and update case predifined fields using the API.
Is there any explantion for this problem? Any hint on how i can achieve this update action.