Integer overflow detected

[snaggle]

Hi all
Noob question alert!

Im trying to execute a mask attack on a .hccpx file.
I know its 10 characters long and a mix of upper and numbers.
I tried

Code:

hashcat -a 3 -m 2500 --force '/root/Captures/1.hccapx' ?u?d?u?d?u?d?u?d?u?d?u?d?u?d?u?d?u?d?u?d

This resulted in this error..

Code:

Integer overflow detected in keyspace of mask: ?u?d?u?d?u?d?u?d?u?d?u?d?u?d?u?d?u?d?u?d

Thanks