Heads Up :
The post you are writing will appear in a public forum. Please ensure all content is appropriate for public consumption. Review the employee guidelines for the community here.
I had the same problem using 8.2.(1). According to the TAC, the 'cache-fs' command has been depricated. However, I was able to get around the problem by upgrading to 8.2.(5). This version supposedly dynamically allocates cache space.