The filename argument passed to fopen() or freopen() specified dsname(member) syntax, but the mode argument specified append or write/update, or specified a fixed standard record format.
Correct the mode argument. A PDS or PDSE data set cannot be opened in a, ab, a+, a+b, w+, w+b, or wb+. A standard fixed record format cannot be specified for a PDS or PDSE member.
JrEdc1opsEbadmode07