On 1/20/19 3:04 PM, ZHANG Cheng wrote:
In the command


gmx solvate -cp 128_minimized.gro -cs water.gro -o waterbox.gro -maxsol 768 
-radius 0.21 -p dppc.top


768 waters are added, resulting in the "waterbox.gro".


However, the "dppc.top" is not updated for its "[ molecules ]" section. I can 
of course manually add that. But why it is not automatically done?


The prompt also shows "0" for "Number of SOL molecules":


Generating solvent configuration
Will generate new solvent configuration of 3x3x3 boxes
Solvent box contains 4435 atoms in 4435 residues
Removed 1235 solvent atoms due to solvent-solvent overlap
Removed 1286 solvent atoms due to solute-solvent overlap
Sorting configuration
Found 1 molecule type:
       W (   1 atoms):   768 residues
Generated solvent containing 768 atoms in 768 residues
Writing generated configuration to waterbox.gro


Output configuration contains 2304 atoms in 896 residues
Volume                 :     421.875 (nm^3)
Density                :     639.416 (g/l)
Number of SOL molecules:      0

solvate is hard-coded to only recognize "SOL" explicitly. You added something called "W," so solvate doesn't know what that is. Update your topology manually if you're doing something non-standard (coarse-grain systems qualify as such).

-Justin

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Justin A. Lemkul, Ph.D.
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