Package: m-tx Version: m-tx-0.60d.ctan20131214 The m-tx.lua script is missing a "then" in the line elseif this_arg == "-c" (line 107) This bug was fixed on 2013-12-24, before TeXLive distributed the package, but I've just discovered that Debian distributes the buggy version. CTAN has the corrected version as well. Bob Tennent