Hi, I'm not sure whether you understood. But I give the following information for you: I am using next example for update billing plan: https://github.com/paypal/PayPal-NET-SDK/blob/develop/Samples/Source/BillingPlanUpdate.aspx.cs .And i found next information too http://stackoverflow.com/questions/29631597/paypal-rest-api-update-billing-plan-return-url, and next comment explain why i can't update my billing plan: "You cannot update the plan, once it is set to active. The reason for that restriction is that because there could be possible agreements based on that plan, modifying it would affect the already agreed billing agreements.....Alternatively, you could possibly create a new plan, and use that instead." . Does exist other way for update current billing plan? I don't want crate a new plan, and use that instead my current plan. RequestUri: {https://api.sandbox.paypal.com/v1/payments/billing-plans/P-41023143HP107945GG6TH2RY} Response: {"name":"BUSINESS_VALIDATION_ERROR","details":[{"field":"payment_definitions","issue":"patch is not supported for this field."}],"message":"Validation Error.","information_link":"https://developer.paypal.com/webapps/developer/docs/api/#BUSINESS_VALIDATION_ERROR","debug_id":"3072ab8d6fc8f"}
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