Re: QDMRTVFO API won't work - help

h
Hello Mark,

You wrote:
>20 long (Carel mentioned this), I am on V4R4 and looking at the API manual
>it only showed 10 alpha
>- is this another trick that IBM has put in these manuals

Since the API is interested only in overrides and overrides are located using 
only the filename, 10 characters is the correct length.

>(before posting this I looked through archives and noticed that when
>IBM says binary(4), they really mean for you to code 9B 0...

What they really mean by BINARY is INTEGER.  Although 9B 0 should work it is 
really a kludge used when calling the APIS from RPG III.  Since you are using 
RPG IV you should change all B data type to I or U depending on need.  
BINARY(2) is coded as 5I 0 and BINARY(4) is coded as 10I 0

However, I don't think that is the cause of your problems.  As others have 
suggested you must initialise the Bytes_Provided part of the Error_Code 
structure.  You can do that by initialising BYTPRV to the %SIZE(ERRCODE).

Pure supposition here ... but are you actually issuing an OVRDBF file command 
and specifying TOFILE or TOMBR before calling the program?  If there isn't an 
override for the named file I'd expect the API to return *ZERO in the 
BYTESRETURNED OF OVRL0100 field.  Since debug indicates that value is 
uninitialised (X'40404040' = 1077952576 which shows in debug as 077952576 due 
to B data types losing the high-order digit) and no escape message is sent it 
appears the API doesn't touch the return structure if there is nothing to 
process.

I suggest that you firstly change the B data types to I, initialise numeric 
fields to *ZERO or an appropriate number, ensure an override is in place for 
the MWPCUSTHST file, and test the API again.

The QDMRTVFO API lists only the following exceptions which are mostly to do 
with the caller stuffing up the parameters.
 1.26.4  Error Messages

   CPF24B4 E Severe error while addressing parameter list.
   CPF3CF1 E Error code parameter not valid.
   CPF3C24 E Length of the receiver variable is not valid.
   CPF3C90 E Literal value cannot be changed.

Since none of these messages are being sent I suspect the API runs but finds 
no override information.  If you can prove that the API doesn't return 
override information when an override is in place then I'd raise a PMR with 
IBM support.

Regards,
Simon Coulter.

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