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Mark,
When weird things happen, look at the activation group.  

Problem 1) When your open() fails, what does it do?  Just return a -1
handle?  Look at FilePath - does it terminate in x'00'?

Problem 2) I have used '__errno' exactly as you have and had no problems
with it.  I posted a code snippet earlier that works (populates the error
code) when it can't open the file.  Did you bind to the correct '__errno'?
(I don't even know if there's another somewhere.  I use BNDDIR(QC2LE)

I am on V4R3.

Buck Calabro
Aptis; Albany, NY

> -----Original Message-----
> From: MSievers@promega.com 
> Sent: Thursday, January 13, 2000 11:12 AM
> To:   RPG400-L@midrange.com
> Subject:      Having problems accessing IFS from RPGIV
> 
> I am having 2 problems access the IFS system from an RPGIV program.   Any
> help would be greatly appreciated.  We are running v4r2.
> 
> 1)  I am having a weird problem with my open() function.  It will work
> fine
> the day I compile the program but the next day it will fail.  If I
> recompile
> the program without making any source changes it will again for that day.
> On both days I am trying to open the same text file.  The text file has
> not
> be altered in any way.   The open is for ready only.
> 
> 2) I am trying to retrieve the value of errno when a function fails
> without
> success.  Here is a snippet of my code.   The variable errno always
> contains
> 0 even when the FileHandle is -1.
> 
> D errnoF          PR              *   EXTPROC('__errno')
> 
> D errnoP          S               *                 
> D errno           S             10I 0 BASED(errnoP)
> 
> C                   Eval      FileHandle=open(%addr(FilePath):oflag)
> C                   EVAL      errnoP = errnoF                       
> C     'errno'       DSPLY                   errno         
> 
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