--dumpstats argument returns error

[FaseehCS]

Hello!
I tried running dlvhex with --dumpstats argument and it does not display all the stats and returns an error. I used --enable-benchmark during configuration. I get the following output

It computes the plan correctly. If I use --verbose=8, it displays all information about no.of rules and atoms with times but --dumpstats does not.
I am looking for information about #choices, #restarts, #conflicts. This is not displayed by --verbose=8.