Charmm-gui solved this issue, but when I run classical charmm run with READ SEQU POPC 475, again It shows the follwing error
CODES>: A TOTAL OF 7935 MISSING PARAMETERS

***** LEVEL -1 WARNING FROM <CODES> *****
***** CODES> MISSING PARAMETERS
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BOMLEV ( -2) IS NOT REACHED. WRNLEV IS 5


***** LEVEL -2 WARNING FROM <AUTGEN> *****
***** DOUBLE BOND SPECS FOR SOME ATOM PAIRS
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BOMLEV ( -2) IS REACHED - TERMINATING. WRNLEV IS 5