Thank you for your reply ,using the command showed that all coeffs are not set even though I did set them previosely,is that due to the init setting and hybrid style?
Pair Coeffs:
1 1: is not set
1 2: is not set
1 3: is not set
1 4: is not set
1 5: is not set
1 6: is not set
1 7: is not set
1 8: is not set
1 9: is not set
1 10: is not set
1 11: is not set
2 2: is not set
2 3: is not set
2 4: is not set
2 5: is not set
2 6: is not set
2 7: is not set
2 8: is not set
2 9: is not set
2 10: is not set
2 11: is not set
3 3: is not set
3 4: is not set
3 5: is not set
3 6: is not set
3 7: is not set
3 8: is not set
3 9: is not set
3 10: is not set
3 11: is not set
4 4: is not set
4 5: is not set
4 6: is not set
4 7: is not set
4 8: is not set
4 9: is not set
4 10: is not set
4 11: is not set
5 5: is not set
5 6: is not set
5 7: is not set
5 8: is not set
5 9: is not set
5 10: is not set
5 11: is not set
6 6: is not set
6 7: is not set
6 8: is not set
6 9: is not set
6 10: is not set
6 11: is not set
7 7: is not set
7 8: is not set
7 9: is not set
7 10: is not set
7 11: is not set
8 8: is not set
8 9: is not set
8 10: is not set
8 11: is not set
9 9: is not set
9 10: is not set
9 11: is not set
10 10: is not set
10 11: is not set
11 11: is not set
It is very likely that you meant to use hybrid/overlay rather than hybrid. A hybrid style means that all pairs must have coefficients for both styles because both styles will be applied at once to all pairs. As an example, hybrid lj/cut ... coul/long is essentially the same as lj/cut/coul/long.
If (I suspect) you are mixing two force-fields, one with lj/cut* and one with lj/charmm*, then you are looking for hybrid/overlay, where some pairs will use the first style, some pairs the second, and unspecified pairs will not have an interaction.
This is incorrect. Pair style hybrid is exclusive but hybrid/overlay may use multiple pair styles for the same pair style (but does not have to). Because of the latter behavior, mixing rules are applied differently and it is highly recommended to provide explicit parameters for all pairs of atom types.
In general, it is not a good idea to mix and match different force fields, especially not if they are using different conventions for assigning charges and LJ parameters like CHARMM and OPLS.