OpenEuphoria

1. Can't create error message file: ex.err

• Posted by Juergen Luethje <j.lue at gmx.de> Sep 05, 2006
• 635 views

Hi all,

when there is a run-time error in an Eu program, the interpreter
normally not only produces an "ex.err" file, but also writes a short
error message with the most important information in a console window.
That's pretty nice.

In situations where it's not possible to write an "ex.err" file (e.g.
because the current directory is on a CD-ROM, or there are no more file
handles available), we would expect that Euphoria still writes the cause
of the error in a console window, no?
I recently discovered that this doesn't seem to happen.

? 1/0

Running this code snippet when the current directory is on my hard
drive, EXW.EXE 2.5 says (as expected):

| C:\temp\test.exw:1
| attempt to divide by 0
| 
| --> See ex.err
| 
| 
| Press Enter...

Running this code snippet when the current directory is on a CD-ROM,
EXW.EXE 2.5 says:

| Can't create error message file: ex.err
| 
| 
| Press Enter...

OK, but what was the primary error? 
I have no information about it, since there is no "ex.err" file, and
Euphoria also doesn't tell me something about it in the console window.

I think Euphoria should display the information
     "Can't create error message file: ex.err"
_additionally_ to the main error message, but not instead of it.

Regards,
   Juergen

-- 
Who is general fault, and why does he read my hard disk?

3. Re: Can't create error message file: ex.err

• Posted by "Greg Haberek" <ghaberek at gmail.com> Sep 05, 2006
• 563 views
• Last edited Sep 06, 2006

> I have no information about it, since there is no "ex.err" file, and
> Euphoria also doesn't tell me something about it in the console window.

You could always direct your ex.err files to a common location.

constant APPDATA = getenv( "APPDATA" )

if sequence( APPDATA ) then
    crash_file( APPDATA & "\\ex.err" )
    crash_message( "Please see \"" & APPDATA & "\\ex.err\" for more
information." )
end if

~Greg

5. Re: Can't create error message file: ex.err

• Posted by Juergen Luethje <j.lue at gmx.de> Sep 07, 2006
• 599 views

Greg Haberek wrote:

>> I have no information about it, since there is no "ex.err" file, and
>> Euphoria also doesn't tell me something about it in the console window.
> 
> You could always direct your ex.err files to a common location.
> 
> }}}
<eucode>
> constant APPDATA = getenv( "APPDATA" )
> 
> if sequence( APPDATA ) then
>     crash_file( APPDATA & "\\ex.err" )
>     crash_message( "Please see \"" & APPDATA & "\\ex.err\" for more
> information." )
> end if
> </eucode>
{{{


I can't remember that I ever encountered an envirinment variable APPDATA
(see also Pete's related post). The envirinment variable TEMP or TMP might
be used instead, though. ( TEMP or TMP pointing to a read-only drive
wouldn't make much sense, would it?  )

However, as I wrote there are other situations where this problem occurs.
I first encountered this problem, when I forgot to close files in a loop.
Try this:

integer fn
for i = 1 to 30 do
   fn = open("c:\\autoexec.bat", "r")
end for
? 1/0

And, as I wrote, there actually is not reason why Euphoria should display
the message
     "Can't create error message file: ex.err"
_instead of_ of the original error message. I can't believe that Rob
intentionally made Euphoria work this way.

Regards,
   Juergen

-- 
Who is general fault, and why does he read my hard disk?

7. Re: Can't create error message file: ex.err

• Posted by "Greg Haberek" <ghaberek at gmail.com> Sep 07, 2006
• 597 views

> I can't remember that I ever encountered an envirinment variable APPDATA
> (see also Pete's related post). The envirinment variable TEMP or TMP might
> be used instead, though. ( TEMP or TMP pointing to a read-only drive
> wouldn't make much sense, would it?  )

I think APPDATA may be a WinNT only environment variable. TEMP is
pretty standard across all flavors of Windows. I'd stick with that.

~Greg

9. Can't create error message file: ex.err

• Posted by Jules Davy <jdavy at dsl.pipex.com> Sep 25, 2006
• 586 views

I'm getting this error message using the pre-alpha non-ncurses version on Linux.
I've checked all the file permissions and everything seems ok, any suggestions
anyone?

Thanks.

11. Re: Can't create error message file: ex.err

• Posted by Andy Serpa <ac at onehorseshy.com> Sep 25, 2006
• 588 views

Jules Davy wrote:
> 
> Jules Davy wrote:
> > 
> > I'm getting this error message using the pre-alpha non-ncurses version on
> > Linux.
> > I've checked all the file permissions and everything seems ok, any
> > suggestions
> > anyone?
> > 
> > Thanks.
> 
> problem not solved but seems to have gone away now. Very mysterious...


Don't know about Linux but that problem can occur on Windows if your program
opens too many files without closing them...

13. Re: Can't create error message file: ex.err

• Posted by Jules Davy <jdavy at dsl.pipex.com> Sep 26, 2006
• 571 views

Euman wrote:
> 
> On Mon, 2006-09-25 at 03:33 -0700, Jules Davy wrote:
> > 
> > posted by: Jules Davy <jdavy at dsl.pipex.com>
> > 
> > I'm getting this error message using the pre-alpha non-ncurses version on
> > Linux.
> > I've checked all the file permissions and everything seems ok, any
> > suggestions
> > anyone?
> > 
> > Thanks.
> > 
> 
> Is this the error???
> 
> ./ecu: error while loading shared libraries: libgpm.so.1: cannot open
> shared object file: No such file or directory
> 
> Regards,
> Euman
> 
> 

Hi Euman,

no it's nothing to do with using ecu or shared libraries. The error comes from
the interpreter
and is "Can't create error message file: ex.err". Nothing to do with opening too
many files either,it seemed
to be independant of the code, which is why I thought it may be due to file
permissions. No problems now, but it would be nice to know why...

15. Re: Can't create error message file: ex.err

• Posted by Bernie Ryan <xotron at bluefrog.com> May 27, 2005
• 630 views

don cole wrote:
> 
> No reason given.
> No other files running (that have anything to do with Euphoria) in 
> Ctl-Alt-Del?
> 
> Any ideas???
> 
> Don Cole
> SF
> 

Don:
   When ever I have had this problem it turned out
   that the ex.err was being written to a different
   place than where I thought it was. Search your
   system for ex.err with find in the explorer.
   Also it can be caused by having the a ex.err
   file all ready open in a different window of your editor.

Bernie

My files in archive:
w32engin.ew mixedlib.e eu_engin.e win32eru.ew

Can be downloaded here:
http://www.rapideuphoria.com/cgi-bin/asearch.exu?dos=on&win=on&lnx=on&gen=on&keywords=bernie+ryan

17. Re: Can't create error message file: ex.err

• Posted by don cole <doncole at pacbell.net> May 28, 2005
• 629 views

akusaya wrote:
> 
> It happens if you open()ed a file but never closed it, so the maximum
> number of open files is reached, Eu cannot open ex.err.
> 
> You should examine your code to make sure it's closed.
> The common mistake is:
> 
> 
> -- **A
> for i = 1 to ... do
>     fn = open("filename", "r") -- **B
>     for j = 1 to ... do
>         read a line from file
>         process line
>     end for
> end for
> 
> **B should be placed on **A.
> 
> 

That's it.
I was openning and reading 258 files and not closing any.

Thank you,

akusaya 

Don Cole
SF