Re: SOLVED, Re: ECONVR (errno=3490) on an IFS open() call?

On 2017-08-11 5:47 PM, James H. H. Lampert wrote:

DAMN, these things are counterintuitive.

Added an O_CCSID to the OFlags (and the necessary other fields) (whitespace columns squeezed to fit):

D OFLG S 10I 0 INZ(16777249) 1+32+16777216
* (O_RDONLY + O_CCSID + O_TEXTDATA)
D MODE S 10I 0 INZ(0)
D CCSID S 10I 0 INZ(37)

and then changed the open to:

C EVAL FD = OPEN(%TRIM(PATH):OFLG:MODE:CCSID)

and it worked right off. Even though I was specifying MY CCSID, rather than the FILE's CCSID.

The doc for the open() API says this for the scenario where an existing file is opened and O_TEXTDATA is specified: "If O_CCSID is not specified, and the file CCSID and open CCSID are not the same, and one of them is not strictly single-byte, open() will fail with errno set to [ECONVERT]."

Since the file CCSID (1208) and the open CCSID (your job CCSID) are not the same, and 1208 is not strictly single byte, it fails with ECONVERT.

When you changed to specify O_CCSID and specified the open-ccsid parameter, the API was fine with the CCSID difference.

(I don't know why it would have worked before, unless the file CCSIDs weren't always 1208. I always specify all four parameters, so I never noticed this issue before.)

https://www.ibm.com/support/knowledgecenter/ssw_ibm_i_72/apis/open.htm;
see the last bullet in the "When an existing file is opened and O_TEXTDATA is specified" section.