Answer / santosh khot

Reference modification is retrieving or Modifying substring
of a string. if Reference modification has a negative value
then Abend Code is soc4, So be care full while using
reference modification
Syntex is Move String(First position, Length) to Var-1.

Answer / ts nithiyanandan

Reference modification is nothing but moving the part of
value of dataname to other dataname.

01 a pic 9(10).
01 b pic 9(10).

move a(4:5) to b.

i.e., moving from 4th byte to 9th byte to dataname b.
from 4th to 9th is length of 5 bytes.

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