There is not enough disk space on the available volumes. Maximum disk space on the most appropriate volume, accounting for ...

There is not enough disk space on the available volumes. Maximum disk space on the most appropriate volume, accounting for the host resource utilization  (in megabytes): %BinaryDiskSpaceAvailable; 
The virtual machine requrement (in mgabytes): %PlacementRequestValue; 
tThe maximum available space at the time of evaluation, after considering the virtual machine requirements (in megabytes): %PlacementCapacityValue;