CEE0502 - Missing operational descriptor

I'm using the "ILE CEE Data and Time APIs" (for the first time *grin*)
and getting the message CEE0502 - "Missing operational descriptor". The
parameters seem to be quite adequate in the debugger.
BTW why doesn't the CRTSQLRPGI command have a DFTACTGRP(*NO) parameter?
Or did I just not notice it? Or are people supposed to 
CRTSQLRPGI *MODULE and the CRTPGM?

Does anyone here have a clue which stupid error did I make?

Any ideas would be appreciated...

                                        Best regards, Juris.

P.S.
Here's what System API Reference says:

Convert Date to Lilian Format (CEEDAYS) API
Required Parameter Group:
1 input_char_date Input VSTRING
2 picture_string Input VSTRING
3 output_Lilian_date Output INT4
Omissible Parameter:
4 fc Output FEEDBACK

Convert Lilian Date to Character Format (CEEDATE) API
Required Parameter Group:
1 input_Lilian_date Input INT4
2 picture_string Input VSTRING
3 output_char_date Output VSTRING
Omissible Parameter:
4 fc Output FEEDBACK


And here's my code:

D* ...
DCurDteA          S             10A                                     
DLilDte           S              9B 0                                   
DWksAgo           S              8A                                     
DPic1             S             10A                                     
DPic2             S             10A                                     
C* ...
C                   CallB     'CEEDAYS'                                 
C                   Parm                    CurDteA                     
C                   Parm                    Pic1                        
C                   Parm                    LilDte                      
C                   Parm                    *Omit                       
C* ...
C                   CallB     'CEEDATE'                                 
C                   Parm                    LilDte                      
C                   Parm                    Pic2                        
C                   Parm                    WksAgo                      
C                   Parm                    *Omit                       
C* ...
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* This is the RPG/400 Discussion Mailing List!  To submit a new         *
* message, send your mail to "RPG400-L@midrange.com".  To unsubscribe   *
* from this list send email to MAJORDOMO@midrange.com and specify       *
* 'unsubscribe RPG400-L' in the body of your message.  Questions should *
* be directed to the list owner / operator: david@midrange.com          *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *