Error: L6449E: While processing .

I have library file in .a format for Ex : algorithm_cal.a like this I am adding this file to file group and made option to target on right click on that file & make it has Library file. when building...
ERROR : L6449E while processing

I am using stm32f4 Discovery tool keil. I have library file in .a format for Ex : algorithm_cal.a like this I am adding this file to file group and made option to target on right click on that file...
ERROR : L6449E while processing

ERROR : L6449E While processing <filename>: <message> why this error came & how to resolve this
Error: L6449E: While processing .

I have library file in .a format for Ex : algorithm_cal.a like this I am adding this file to file group and made option to target on right click on that file & make it has Library file. when building...
ERROR : L6449E while processing

ERROR : L6449E While processing <filename>: <message> why this error came & how to resolve this