Unable to Open COS.OBJ File In C

Linker Error:Unable to open File COS.OBJ

This error is also due to the incorrect path of Library Directories. Default path for library is “C:/TC/LIB”. But if you are not installed Turbo C on another location or if you moved the installed TC folder to another, then you have two choices to correct the path. One is move your installed TC folder to you C drive without making a new folder. or change the path of library directory to path of your (installed) library folder (Example: D:/Software/Turbo C/ TC/LIB). Be ensure the LIB folder contains all library files like ‘COS.OBJ’, ‘COT.OBJ’ etc.For set path Follow Steps:
1.Open Turbo c.
2.GoTo Options.
3.Click on Directeries.

In Library Directories set the Default path'C:/TC/LIB' or your location(may be not same in all pc, so first you need to check) where LIB folder is located.