The ?F code appears to cause a problem

[radix]

Code:

./oclHashcat-plus64.bin --gpu-loops 1024 -n 800 test -a 3 -1 ?l?d?s?u?h?F?R?D --force

Session.Name...: oclHashcat-plus
Status.........: Aborted
Input.Mode.....: Mask (?1?2?2?2?2?2?2?3?3?3?3?d?d?d?d)
Hash.Target....: aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Hash.Type......: MD5
Speed.GPU.#1...:  5278.9M/s
Recovered......: 0/1 Digests, 0/1 Salts
Progress.......: 22976921600/260000000000 (8.84%)
Rejected.......: 0/22976921600 (0.00%)
HWMon.GPU.#1...: 95% Util, 45c Temp, 20% Fan

looks good