Hi , i am getting this error when i am trying to generate class from partner.wsdl file. Please help me

I want to execute process builder action only when the opporunity owner changed from A to B and using the advance option of specific changes made to  the record. i do not want to execute action for any other change of the record but it is giving me error. Any Suggestions?

After editing my apex class from within the Force.com IDE, i clicked "Save" button. Got an error "File saved locally, not to server". How can i get past this errror? Thanks!