Need help understanding compile error

["Tim Kredlo" <TKredlo@xxxxxxxxxxxxxxxx>]

I am receiving compile errors that I do not understand.
Running V5R2.
Source code / errors are as follows:
        (CIPB0001 is a DDS declared CIpB00Fm screen format with input
fields)   

FCIpB00Fm  CF   E             WorkStn 

017400 D InPut01         Ds             LikeRec(CIPB0001:*Input)            
017500 D  I1                            1    Dim(%Len(InPut01))

======>                  aa

*RNF3703 20 a      017500  The subfield or parameter definition is not
specified 
                           within a group.

017600 D                                     Overlay(InPut01:1)

======>                                      aaaaaaa

*RNF3601 20 a      017600  Keyword is not allowed for a field definition;
keyword
                           ignored.

Is it the 'LikeRec' that is causing the problem?
I did not see anything in the ILE RPG reference manual in the 'overlay'
keyword section restricting the use of 'overlay' with data structures
defined with 'likerec'.

TIA

Tim Kredlo
Exterior Wood, Inc