I've a protein and want to insert in lipid bilayer membrane using a set of VMD commands
1- set membrane [atomselect top all]
2- set BSAmol [mol new BSA.psf]
3- mol addfile BSA.pdb
4- set BSA [atomselect $BSAmol all]
5- $membrane moveby [vecinvert [measure centre $membrane weight mass]]
6- $membrane writepdb membrane_temp.pdb
7- $BSA moveby [vecinvert [measure centre $BSA weight mass]]
But everytime getting error after 5th command (error- can't use non-numeric string as operand of "-" )
Now I don't know how to resolve this. kindly help me out.
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