[Pw_forum] a question about relaxing

[Ezad Shojaee]

hi
i want to relax a structure like TiO2 and when i set the parameter " dt " 
greater than about  " 1 " , i get this message :

from checkallsym : error #     5
not orthogonal operation

i wander if anyone knows the exact role of the " dt " parameter & the 
meaning of the error ?
thanks

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