Thanks @lissyx ,
I went through your reply on post -
[FIXED] Error with master/alpha8 (unknown op: UnwrapDatasetVariant & WrapDatasetVariant) - #20 by lissyx
so currently, i am training without --nouse_seq_length flag.
Those were simple steps i was making a note for myself on text file . I will keep in mind to have proper formatting on my next comments .
Thanks-alot!!