Hi, I am receiving this error message:


***** LEVEL -4 WARNING FROM *****
***** GENERATING TOO MANY CONTACTS
******************************************
BOMLEV ( -5) IS NOT REACHED. WRNLEV IS -3

Based on previous recommendations, I have attempted the following fixes:
1. Increased the size of the PBC
2. Checked that all atoms have coordinates.
3. CHARMM is installed using xxlarge and that the initial message regarding the maximum number of atoms is significantly more than what is in my system.

However, if I change the nonbonded parameters from group based to atom based, the error disappears. I cannot figure out why this is the case. Has anyone encountered this issue before, or might have a clue with regards to the source?

Last edited by bnumn; 06/21/21 07:50 PM.