Voltus extraction error

Hi All,

i have tried rail analysis on top level and while doing extraction is shows below error and flow is stoped

** ERROR: (VOLTUS_EXTR-1013): Unexpected condition has occurred. Terminating the program execution.
vector::_M_range_check: __n (which is 4294966193) >= this->size() (which is
1)

can anyone help me in this issue 

Thanks in advance