The message means that the column in question is not replicated. There can be many reasons for this, including datatype for the column not supported by SharePlex, exclusion of the column due to Vertical Partitioning enabled on that column, and so on.
As an example, my table is in replication and is Vertically Partitioned. It has three columns, one of which named CHAR_COL2 is excluded from replication via Vertical Partitioning. When I take the dump of its object cache, it shows the column as “Column not replicated” under the “Column info” field as shown below:
$ cat source.out
"SHA91"."TABLE2"
998281
Type: TABLE Vertically partitioned
Key Type: No unique key Number of key columns: 2
Number of columns: 3
Status: In Replication
--------------------------------------------------------------------------------
Col |Length|Type |Name |Column info
1 22 NUMBER NUM_COL Key, Nullable
2 10 VARCHAR2 CHAR_COL1 Key, Nullable
3 10 VARCHAR2 CHAR_COL2 Column not replicated
