[CP2K-user] xTB_coulomb CPASSERT error

[Stefano Ferrero]

Dear CP2K experts,
I am using the xTB method to optimize the cell parameters for an ice bulk 
and I encountered this problem:
The calculation runs only if I specify the DO_EWALD keyword in the input to 
replace the direct sum of Coulomb interactions.
Is there a particular explanation for that? Is it better (within the xTB 
framework) to calculate the electrostatics with the Ewald summation?
Thank you very much for your help!

Stefano
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