At least one argument is required. All arguments are simple keywords, the permitted values being both, coff, cv, fixup, map and pdata. Anything else is a fatal error (LNK1117). Though both and coff are syntactically valid, they are obsolete and cause a warning (LNK4224). Otherwise, coff is ignored and both is treated as cv.

The /debugtype option is for the command line only. It is not valid as a directive in an object file.