RNF0401 (WDSCi) An error occured during communication with the host.

WDSCi and RNF0401

On some programs, when verifying an ILE RPG program in WDSCi,  I got the 
message stated in the subject .

After trying all sorts of things for instance refeshing the cache, I came 
to the conclusion it was the contents of the display file that causes the 
problem.
It only seems that the verify cannot locate the display file for retrieving the 
external description.
 
I have narrowed the problem down to the following keywords in the display 
file.

If I use the keywords INDARA in combination with the keyword ROLLUP(xx) or 
ROLLDOWN(xx) and use an indicator on the roll keys the VERIFY in WDSCi 
gives the error RNF0401 which has no relation on the real cause of the 
problem ! 

Hereby the stripped source which I have used.

Please try and let me know your findings !

     A                                      INDARA
     A          R FAG255S1                  SFL
     A            COPTIE         1Y 0B  9  3
     A          R FAG25501                  SFLCTL(FAG255S1)
     A                                      SFLSIZ(0015)
     A                                      SFLPAG(0014)
     A                                      SFLDSPCTL
     A                                      SFLDSP
     A                                      ROLLDOWN(93)


    FFAG255FM  CF   E             WORKSTN
    C                   MOVE      *ON           *INLR


Best Regards / Met vriendelijke groet, 

Willem Kruize