Thanks for the suggestion. It worked but even after reading the libraries Compiler is unable to link the design.
I am using a benchmark circuit s298 form ISCAS89 benchmark circuit. The following errors are being shown:
Information: Building the design 'NAND3X1'. (HDL-193)
Warning: Cannot find the design 'NAND3X1' in the library 'WORK'. (LBR-1)
Warning: Unable to resolve reference 'NAND3X1' in 's298'. (LINK-5)
How to resolve this issue as there are more than 100 .db files in db_ccs?