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Insufficient Memory Error

Posted on 2004-09-24
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Last Modified: 2010-04-05
I have a place in my program in which I have an IBDataSet. I Have a routine in which goes until end of file. Like this:

while not DataSet.eof do
begin
 // I commented everything he was doing it here to see
 //if the error stops, but it didn´t.
DataSet.Next;
end;

So the only thing is doing is going through the Data. And when I try to do something else after this routine it gives give the error: "Insufficient Memory" What can it be ? Thanx
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Question by:fabyola
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Expert Comment

by:esoftbg
ID: 12147731
Have your DataSet assigned events as:
  DataSetBeforePost(DataSet: TDataSet);
or
  DataSetAfterPost(DataSet: TDataSet);
It is possible the reason about the "Insufficient Memory" to be there ....
Just try to guess ....
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LVL 12

Expert Comment

by:esoftbg
ID: 12149448
Please ignore my above comment (It was after midnight bulgarian time and I was very tired):

Has your DataSet assigned events as:
procedure TForm1.DataSetBeforeScroll(DataSet: TDataSet);
begin
//........
end;
or
procedure TForm1.DataSetAfterScroll(DataSet: TDataSet);
begin
//........
end;

It is possible the reason about the "Insufficient Memory" to be there ....
Just try to guess ....
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Expert Comment

by:Voodooman
ID: 12149819
Hi - comment only

Just an idea - lots of data applications write temp files trasparently - is your temp directory full?

Or is your temp directory on a drive with only small free space?

Also - remember that Error Messages are not to be relied on - the message is just what the programmer thought would be most appropriate in the circumstance - the actual error could be something completely different!

Voodooman

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LVL 12

Expert Comment

by:esoftbg
ID: 12149845
Ofcourse the reason for the "Insufficient Memory" could be outside your application: some spyware or some virus ....
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Author Comment

by:fabyola
ID: 12158881
No it´s not a spyware or some virus because it happens on any computer. And it´s not using a Temp directory. And it also doesn´t have nothing on afterscroll or beforescroll events.
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Expert Comment

by:Ferruccio Accalai
ID: 12160275
what is important to know is the Exception Type
Is it an EIBError? Or just an  EAccessViolation? That's important to get a point of start....
Then also note that if you've called TIBDataset.Prepare before the loop then you have to reset the satus calling Unprepare (releasing memory). But everything said depends on the status of the IBDataset...
0
 

Author Comment

by:fabyola
ID: 12198727
I was a simple error message. It wasn´t an "EIBError" neither an "EAccessViolation" error. I also didn´t call TIBDataset.prepare. I only did an TIBDataset.Open; before doing the loop. Can it be it´s beause it´s too much data ?
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Assisted Solution

by:Ferruccio Accalai
Ferruccio Accalai earned 62 total points
ID: 12199049
Just doing scroll to EOF isn't a believable reason for such kind of error even if there are lot of datas. What about the object (if you are using it)? Are there some datacontrols llinked like grids or edits? Or some other dataset in Master-detail?
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Accepted Solution

by:
Voodooman earned 63 total points
ID: 12199259

Hi

According to this http://www.better-office.com/Deutsch/Produkte/Borland/InterBase/InterBase_Community/InterBase_Com_Aktuell/InterBase_Com_Aktuell__minus__25_Jul__brO_1_brC_.htm

These IBX datasets have ememory allocation problems.

Take a look at the above it might help explain and has some suggestions.

Of course you could actually be running out of memory and then out of paging space.  Looping thru recs is one of the most inefficient things you can do with a recordset.  If you were actually paging to disk you would probably not even notice if you were looping thru the recs.

What are you doing in the loop (I hope you are not putting the recs into arrays for instance - I have seen this done) - are you doing anything that would diminish resources?

Voodooman
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