Loading an array from file vs external described data structure.

[John Rusling <jrusling@xxxxxxxxxxxxxxxxxxx>]

This is puzzling, to me.

When I use an F-spec for the file named lmit, I can auto-load an array thus -

     flmit      if   e           k disk
...
     d myds            ds
     d  custarrdata
     d  lcust1                             overlay(custarrdata)
     d  lcust2                             overlay(custarrdata:*next)
     d  lcust3                             overlay(custarrdata:*next)
     d  lcust4                             overlay(custarrdata:*next)
     d  lcust5                             overlay(custarrdata:*next)
     d  lcust6                             overlay(custarrdata:*next)
     d  lcust7                             overlay(custarrdata:*next)
     d  lcust8                             overlay(custarrdata:*next)
     d  lcust9                             overlay(custarrdata:*next)
     d  lcus10                             overlay(custarrdata:*next)
     d  custarr                            overlay(custarrdata)
     d                                     dim(10) like(lcust1)

but when I remove the F-specand c/ to an external desc data struc it doesn't work

     d lmitds        e ds                  extname(lmit)

*RNF3315 20     10 The Name entry is already defined on a Definition     
                   Specification; defaults to blanks.                    
*RNF7030 30      1 The name or indicator is not defined.                 
*RNF7301 30      1 Position of subfield is greater than length of data   
                   structure; specification ignored.    


Nothing else changed, only changed from an F-spec to ext desc data struc ? ?

Anyone have any explanation for this or run across this before?

Tia

John B