Does Husband have to prove that he would have been granted spousal support even if he had failed to provide evidence on both sides of the argument?

Husband does not raise a prejudice argument in relation to this second issue. Because Husband does not demonstrate why it is reasonably probable a result more favorable to Husband would have been reached absent the error, i.e., why it is reasonably probable that he would have been granted spousal support, we do not reverse the judgment. (Kostecky v. Henry (1980) 113 Cal.App.3d 362, 374 ["it is incumbent upon the appellant to demonstrate that the error was prejudicial under the particular facts in evidence"].)