Hello, I have a makefile which does the following: 1. grab a .gz file from server using wget -- works fine 2. extract the data from .gz file to new file based on filter using ZCAT -- works fine 3. sort the data from based on specific field and saves the data into a new file -- DOES NOT WORK - command looks like this: sort -t: -k2n outputFile - this command works perfectly on command line of cygwin BUT fails through makefile - Error says: Input file specified two times. I tried to search on this online but couldn't get any info. Can you please help and show me what's wrong? In make file i have this command enclosed with "`" character. Any feedback on this would be greatly appreciated. Thank you. Harpal