Why cancel button is not available for some contract lines?

[eruiz67]

I use the contract.contract module. I want to know in witchscenarios the cancel button of a line is available? Because some times I want to cancel a line and the

Module

contract.contract

Describe the bug

I want to know what condictions must be present in order to see the cancel button of contract line available. Is there any way cancel a line that is in the state "Close"?

Additional context I am working with odoo v12

[rousseldenis]

Indeed, an explanation should be an improvement on conditions to have some actions possible (in interface) as it's in code but not really clear, even when debugging.