Re: AttributeError in collision_detection

[Jean-Noël Grad]

Dear Ahmad,

You probably compiled espresso with a custom myconfig.hpp file that is 
missing feature COLLISION_DETECTION. Add the following line to the 
myconfig.hpp file and recompile espresso:

#define COLLISION_DETECTION

Best regards,
JN

On 2/28/20 1:13 PM, Ahmad Reza Motezakker wrote:
> Dear EspressoMD users,
>
>
> I am trying to define collision in my system and I face attribute error as:
>
> AttributeError: 'NoneType' object has no attribute 'set_params'
>
>   
>
> Below, please find the lines of the code which is related to the 
> collision detection.
>
> ---
>
> ---------------------------------------------------------------------------
> AttributeError                             Traceback (most recent call last)
> <ipython-input-15-4acfe63d1151>  in<module>
> 5  bond_centers=  interactions.HarmonicBond(k=1000,  r_0=0.2)
> 6  system.bonded_inter.add(bond_centers)
> ----> 7system.collision_detection.set_params(mode="bind_centers",  
> distance=0.2,  bond_centers=bond_centers)
> 8  
> 9  #system.bonded_inter.add(fene)
>
> AttributeError: 'NoneType' object has no attribute 'set_params'​
>
> ----
>
> I really be thankful if you could help me with this.
>
>
> Best Regards,
>
> Ahmad Reza