No Mountable File System

[GtrDude]

I was trying to install an app and am getting
"No Mountable File System"

Is there a way to fix this?

I have tried the suggestions in this thread, don't have a lexar usb drive:
https://discussions.apple.com/thread/3801444?tstart=0

Also tried to download the app twice and am still getting this error.

Is there a fix for this?
2014 MacBook Air, Yosemite.

Thanks

 

[GtrDude]

Never mind.

Problem fixed.

Took one more download and it worked just fine.
Must have been a corrupt download.