We had ‘Memory Hotplug’ enabled for VM’s in our environment and was wanting to increase memory on one of the guest servers.
The operation was failing giving the following error:
After getting this error . Please check the OS disk data store have space extend the memory.
Current data store have only 515 Mb space. that’s why you got above issue.
FIX – Extend the current data store or Move (or) Migrate some VM into space available data store . After that working for me 🙂 🙂 🙂