The ASCII code page option (-a) was present on the chcp command line along with either the query (-q) or reset (-r) options. The -a option can be used only when the set option (-s) is present or defaulted. Do not specify either -a or -e when performing a query or reset operation.
Reenter the chcp command with correct command options. For a description of the chcp options, see z/OS UNIX System Services Command Reference.