No Subject

 Good Morning / Afternoon,

I have written a small program using a multi member physical file.
This physical file has 3 logicals built over it L0,L1,L2

I create a new member in the physical file, but when the program runs, it
falls over 
with a message saying that the logicals do not contain the members
specified.

If, when I add a new member to the physical file I also add one to the
logical file, all is well.

I do not understand why it is necessary to add members to Logical files,
surely the logical is just a pointer 
to the physical, the physical is overridden to the required member, hence
the logical points to the required member.
As far as the logical is concerned it is pointing at the physical.
This was my understanding but is obviously wrong...
If anyone can offer me an explaination it would be greatly appreaciated.

I hope this makes sense

Thanks in advance

Colin Thorpe  

 
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