I/O error -100059 while using GDX I/O API

GAMS
1

Hello,

does anyone have a clue what I/O error -100059 on Windows XP might
mean? (In the API documentation there is written that the error code
is system dependent.) It always occurs while I try to open a new GDX
file for writing (regardless of whether I use OpenWrite(…) or
OpenWriteEx(…) metod). Unfortunately, I was not able to get any
useful info from Mr Google…

Thanks for any help.

Best regards,
nvx
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2

Hi nvx,

You can get the error message text by calling the function gdxErrorStr
For this message it returns ‘File is already open’.

–Paul


On Jun 24, 11:57 am, nvx wrote:

Hello,

does anyone have a clue what I/O error -100059 on Windows XP might
mean? (In the API documentation there is written that the error code
is system dependent.) It always occurs while I try to open a new GDX
file for writing (regardless of whether I use OpenWrite(…) or
OpenWriteEx(…) metod). Unfortunately, I was not able to get any
useful info from Mr Google…

Thanks for any help.

Best regards,
nvx
–~–~---------~–~----~------------~-------~–~----~
To post to this group, send email to gamsworld@googlegroups.com
To unsubscribe from this group, send email to gamsworld+unsubscribe@googlegroups.com
For more options, visit this group at http://groups.google.com/group/gamsworld?hl=en
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3

Dear Paul,

thank you for the quick response and for the hint regarding the method
gdxErrorStr. There is, however, one thing I still do not understand.
My (simplified) Java code looks like this:

gdxjava gdxIO = new gdxjava();
int errNr = new int[1];
// …
gdxIO.OpenWrite(“results.gdx”, “DFPPProc”, errNr);
if (errNr[0] != 0) {
throw new Exception(“An error has occured during preparation of
the target GDX file (” + errNr[0] + “).”);
}
// …

The error occurs regardless of the existence of the file
“results.gdx.” How can it already be open if it doesn’t exist before I
invoke OpenWrite(…)?

Any ideas?

Best regards,
nvx


On 24 čvn, 18:26, Paul van der Eijk wrote:

Hi nvx,

You can get the error message text by calling the function gdxErrorStr
For this message it returns ‘File is already open’.

–Paul

On Jun 24, 11:57 am, nvx wrote:

Hello,

does anyone have a clue what I/O error -100059 on Windows XP might
mean? (In the API documentation there is written that the error code
is system dependent.) It always occurs while I try to open a new GDX
file for writing (regardless of whether I use OpenWrite(…) or
OpenWriteEx(…) metod). Unfortunately, I was not able to get any
useful info from Mr Google…

Thanks for any help.

Best regards,
nvx
–~–~---------~–~----~------------~-------~–~----~
To post to this group, send email to gamsworld@googlegroups.com
To unsubscribe from this group, send email to gamsworld+unsubscribe@googlegroups.com
For more options, visit this group at http://groups.google.com/group/gamsworld?hl=en
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4

Problem solved!

I forgot to invoke gdxIO.Close() after reading data from another file.

Thanks for the assistance.

Best regards,
nvx


On 24 čvn, 20:20, nvx wrote:

Dear Paul,

thank you for the quick response and for the hint regarding the method
gdxErrorStr. There is, however, one thing I still do not understand.
My (simplified) Java code looks like this:

gdxjava gdxIO = new gdxjava();
int errNr = new int[1];
// …
gdxIO.OpenWrite(“results.gdx”, “DFPPProc”, errNr);
if (errNr[0] != 0) {
throw new Exception(“An error has occured during preparation of
the target GDX file (” + errNr[0] + “).”);
}
// …

The error occurs regardless of the existence of the file
“results.gdx.” How can it already be open if it doesn’t exist before I
invoke OpenWrite(…)?

Any ideas?

Best regards,
nvx

On 24 čvn, 18:26, Paul van der Eijk wrote:

Hi nvx,

You can get the error message text by calling the function gdxErrorStr
For this message it returns ‘File is already open’.

–Paul

On Jun 24, 11:57 am, nvx wrote:

Hello,

does anyone have a clue what I/O error -100059 on Windows XP might
mean? (In the API documentation there is written that the error code
is system dependent.) It always occurs while I try to open a new GDX
file for writing (regardless of whether I use OpenWrite(…) or
OpenWriteEx(…) metod). Unfortunately, I was not able to get any
useful info from Mr Google…

Thanks for any help.

Best regards,
nvx
–~–~---------~–~----~------------~-------~–~----~
To post to this group, send email to gamsworld@googlegroups.com
To unsubscribe from this group, send email to gamsworld+unsubscribe@googlegroups.com
For more options, visit this group at http://groups.google.com/group/gamsworld?hl=en
-~----------~----~----~----~------~----~------~–~—

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