Enter, delete or retrieve a mnemonic name
                +----------------------------------------+
                | CALL  CDNAME (PATH,NW,CHTAG,CHOPT,IRC*) |
                +----------------------------------------+
                                  
- PATH
 - Character string specifying the directory path
name in which the alias is returned (option  R)
 - NW
 - Integer variable specifying the number of
significant elements of  CHTAG
 - CHTAG
 - Character array of significant length  NW
containing the mnemonic names for each element of objects stored in the
directory  PATH
 - CHOPT
 - Character variable specifying the options
required.
- 'D'
 - Delete the current mnemonic name definitions for
the specified path name ( CHTAG are ignored).
 - 'R'
 - Return the current mnemonic name definitions in
 CHTAG
 - 'P'
 - Print the current mnemonic name definitions for
objects stored in the directory  CHTAG are ignored)
 - 'U'
 - Update the DICTIONARY directory with the
specified mnemonic names.
 
 - IRC
 - Integer return code
-   0
 - Normal completion
 - 182
 - Illegal path name
 - 183
 - Illegal number of data words
 - 201
 - Dictionary directory not found
 - 205
 - No mnemonic name definitions found
 
 
See page
 [more info] for a discussion of HEPDB mnemonic names.