The Error message is:

"domain\user does not have permission to alter object 'mf20'..................."

I gone through the work around and found the solution as below:

Open Services, go to Analysis services--->right click on it --> Properties-->LogOn --> select This Account -->give server and your user name here. confirm it is your user, click ok.

Stop the service and again start the service. check the service Log On As in your user name.

Thant's it. save your cube in BIDS and close and reopen the cube, then deploy the cube. it will deploy and process it.

I hope this will help.