I've encountered a novel error while running association analysis in PLINK. I input the following command:
./plink --bfile file_merged --pheno phenotype.txt --allow-no-sex --covar plink.mds --covar-name C1,C2,C3,C4,C5,C6,C7,C8,C9,C10 --out association_results --linear --adjust
I received the following error message:
Zero valid tests; --adjust skipped.
I have completed association analyses previously using the same command, so I am just wondering if anyone knows the source of the error.