My guess is that you are mixing name format modes here.
ftp> quote help
214-Server-FTP commands follow:
214-Unsupported commands marked with an *.
214-ABOR, ACCT*, ADDM, ADDV, ALLO*, APPE, AUTH, CDUP, CRTL, CRTP, CRTS,
214-CWD, DELE, DLTF, DLTL, EPRT, EPSV, FEAT, HELP, LIST, MKD, MODE,
214-NLST, NOOP, OPTS, PASS, PASV, PBSZ, PORT, PROT, PWD, QUIT, RCMD,
214-REIN, REST*, RETR, RMD, RNFR, RNTO, SITE, STAT, STOR, STOU, STRU,
214-SYST, TIME, TYPE, USER, XCUP, XCWD, XMKD.
214-The data representation type may be ASCII(A), EBCDIC(E), binary IMAGE(I),
214-DBCS_ASCII(B), DBCS_EBCDIC(F) or CCSID(C).
214-Data structure must be file(F) or record(R). Mode can be stream (S) or block (B).
214-If this connection is not used more than 300 seconds, the session will end.
214-Name Format 0 :
214-File identifiers have three components: File, library, and member.
214-Library and file components are separated by the / delimiter.
214-File and member components are separated by the . delimiter.
214-Example: Library/file.member.
214-Name Format 1 :
214-Directory levels separated by the / delimiter.
214-Database files use format: /QSYS.lib/Libname.lib/Fname.file/Mname.mbr
214-Documents (files) stored in folders use format: /QDLS/folder/document.ext
214-Integrated File Systems include: "root" (/), QOpenSys, QLANSrv.
214-Integrated File System files use format: /fsname/fsdependentnamingformat
214 For information about a specific command, enter HELP <command>.