Memory leak in loadxml?

[LaxRoth]

Hi, i'm trying to load an xml document from C++ with:




MSXML::IXMLDOMDocumentPtr pXMLDocument (__uuidof (MSXML:OMDocument)); // main document parsed

hr = pXMLDocument->loadXML (BSTRTemp); /* trying parse string, if success, we have doc object*/


this method uses offensive memory. i have xml files that are about 100MB size.

i feel the function does not clear the memory. anyone an idea?
if i load 3 times the same file, my memory is full.


suggestion? is there a free method or something?


thank you,


lutz

[humptydumpty]

Hi, i'm trying to load an xml document from C++ with:




MSXML::IXMLDOMDocumentPtr pXMLDocument (__uuidof (MSXML:OMDocument)); // main document parsed

hr = pXMLDocument->loadXML (BSTRTemp); /* trying parse string, if success, we have doc object*/


this method uses offensive memory. i have xml files that are about 100MB size.

i feel the function does not clear the memory. anyone an idea?
if i load 3 times the same file, my memory is full.


suggestion? is there a free method or something?


thank you,


lutz

at starting Initializes the COM library with CoInitialize(NULL)
after finishing your xml work

Closes the COM library

by CoUnInitialize()

Deallocates a string allocated Memory

use ::SysFreeString(BSTR);

check for CString that if your allocated memory all are free or not

then check whether you are allocating memory with new or not if yes
Don't forget to Release it use delete []

if still proble let me know



//to release BSTR memory

[LaxRoth]

Hi, all done. sorry, not written explicitly.

currently:

hr = pXMLDocument->load (filename); /* trying parse string, if success, we have doc object*/

i iterate over a function that creates smartptr this way:
MSXML::IXMLDOMDocumentPtr pXMLDocument (__uuidof (MSXML:OMDocument));



looks like this:

CoInitialize(NULL);

--> Iterate 200x
--> MSXML::IXMLDOMDocumentPtr pXMLDocument
---> pXMLDocument.load(filename)
---> do some blaaaaah

CoUninitialize();



still memory leaks. i tried to create a global pointer to pXMLDocument, same effect. does ist store internal data, how can i free it....

[Yves M]

Did you do pXMLDocument.Release() at the end? Otherwise that object doesn't get freed properly.

[LaxRoth]

hi, i used smartpointer. this type releases itself when my function is finished. i see him walking through release. well, i will try to use normal com pointer. but i guess thats not it.

[humptydumpty]

hi, i used smartpointer. this type releases itself when my function is finished. i see him walking through release. well, i will try to use normal com pointer. but i guess thats not it.

Fine do one thing
it happens due to LoadXml
when you are loading a xml by LoadXml
after finishing your work just check it out still file exist and that's why i think u rgetting error
it's aloop hole of microsoft
better

after finishing your work do this
pXMLDocument->loadXML(CComBSTR(""), &bSuccessful );
pXMLDocument = NULL;
::CoUninitialize();

Load a empty string
and your memory leakage will remove.
hopefully this will help you

[LaxRoth]

hi,

if i call pXMLDocument->loadXML(BSTR(""));
i get some exceptions:

Nicht abgefangene Ausnahme in kp32sqke.exe (KERNEL32.DLL): 0xE0000001: (kein Name).
Nicht abgefangene Ausnahme in kp32sqke.exe (KERNEL32.DLL): 0xE0000001: (kein Name).
Nicht abgefangene Ausnahme in kp32sqke.exe (KERNEL32.DLL): 0xE0000001: (kein Name).
Nicht abgefangene Ausnahme in kp32sqke.exe (KERNEL32.DLL): 0xE0000001: (kein Name).
Nicht abgefangene Ausnahme in kp32sqke.exe (KERNEL32.DLL): 0xE0000001: (kein Name).
Nicht abgefangene Ausnahme in kp32sqke.exe (KERNEL32.DLL): 0xE0000001: (kein Name).



memory still remains high.

[humptydumpty]

hi,

if i call pXMLDocument->loadXML(BSTR(""));
i get some exceptions:

Nicht abgefangene Ausnahme in kp32sqke.exe (KERNEL32.DLL): 0xE0000001: (kein Name).
Nicht abgefangene Ausnahme in kp32sqke.exe (KERNEL32.DLL): 0xE0000001: (kein Name).
Nicht abgefangene Ausnahme in kp32sqke.exe (KERNEL32.DLL): 0xE0000001: (kein Name).
Nicht abgefangene Ausnahme in kp32sqke.exe (KERNEL32.DLL): 0xE0000001: (kein Name).
Nicht abgefangene Ausnahme in kp32sqke.exe (KERNEL32.DLL): 0xE0000001: (kein Name).
Nicht abgefangene Ausnahme in kp32sqke.exe (KERNEL32.DLL): 0xE0000001: (kein Name).



memory still remains high.

are you sure.
check it out once again and this code is one of my working project

[LaxRoth]

very sure.

currently i import msxml.dll:

#import "msxml.dll" named_guids


create smartptr:

MSXML::IXMLDOMDocumentPtr pXMLDocument (__uuidof (MSXML:OMDocument)); // main document parsed


load xml from file:

hr = pXMLDocument->load (filename); /* trying parse string, if success, we have doc object*

your suggestion:
pXMLDocument->loadXML("");
pXMLDocument = NULL;



i have also tried with MSXML2:: namespace, same effect.
its too my working project...

[humptydumpty]

very sure.

currently i import msxml.dll:

#import "msxml.dll" named_guids


create smartptr:

MSXML::IXMLDOMDocumentPtr pXMLDocument (__uuidof (MSXML:OMDocument)); // main document parsed


load xml from file:

hr = pXMLDocument->load (filename); /* trying parse string, if success, we have doc object*

your suggestion:
pXMLDocument->loadXML("");
pXMLDocument = NULL;
i have also tried with MSXML2:: namespace, same effect.
its too my working project...

due to xml version effect check with this
#import <msxml.dll> named_guids
using namespace MSXML;

hr = spDocument.CoCreateInstance(CLSID_DOMDocument);
hr = spDocument->load(CComVariant(strpath), &bSuccess);
if still getting problem
please post your code

[LaxRoth]

due to xml version effect check with this
#import <msxml.dll> named_guids
using namespace MSXML;

hr = spDocument.CoCreateInstance(CLSID_DOMDocument);
hr = spDocument->load(CComVariant(strpath), &bSuccess);
if still getting problem
please post your code

sorry what is spDocument ?

[humptydumpty]

sorry what is spDocument ?

spDocument Object of IXMLDOMDocument
CComPtr<IXMLDOMDocument> spDocument;

[Yves M]

hi, i used smartpointer. this type releases itself when my function is finished. i see him walking through release. well, i will try to use normal com pointer. but i guess thats not it.

My point is that if you do everything in main(), then the document won't get released until after main() has finished and so it didn't get released before calling CoUnintialize.

[LaxRoth]

hi, i see the com pointer walking through release...its not called in main function. i will try in separate project. meanwhile i post som xml...is this correct syntax???

or maybe the files are wrong?


<?xml version='1.0' encoding='Windows-1250'?>
<connection>
<TXTXMLRow refid='1' ID='dpe' DbSystem='SQLServer' Db='dpe' ConnType='ADO' DSN='nblb' PhysUser='sa' PhysPwd='sa' active='No' activedb='No'/>
<TXTXMLRow refid='3' ID='ADIMP' DbSystem='Sybase' Db='ADIMP' ConnType='ODBC' DSN='ADIMP' PhysUser='sa' PhysPwd='opensoft' active='No' activedb='No'/>
<TXTXMLRow refid='4' ID='ADROB' DbSystem='Sybase' Db='ADROB' ConnType='ODBC' DSN='ADROB' PhysUser='sa' PhysPwd='opensoft' active='No' activedb='No'/>
</connection>

[humptydumpty]

hi, i see the com pointer walking through release...its not called in main function. i will try in separate project. meanwhile i post som xml...is this correct syntax???

or maybe the files are wrong?


<?xml version='1.0' encoding='Windows-1250'?>
<connection>
<TXTXMLRow refid='1' ID='dpe' DbSystem='SQLServer' Db='dpe' ConnType='ADO' DSN='nblb' PhysUser='sa' PhysPwd='sa' active='No' activedb='No'/>
<TXTXMLRow refid='3' ID='ADIMP' DbSystem='Sybase' Db='ADIMP' ConnType='ODBC' DSN='ADIMP' PhysUser='sa' PhysPwd='opensoft' active='No' activedb='No'/>
<TXTXMLRow refid='4' ID='ADROB' DbSystem='Sybase' Db='ADROB' ConnType='ODBC' DSN='ADROB' PhysUser='sa' PhysPwd='opensoft' active='No' activedb='No'/>
</connection>

Better it you put your file.
then it's easy to find actual error.
because all possibilities are discussed here.
now without seen the project i don't think that anyone can tell you exact problem.