Bigtext Memory Leak

kriki

If you use a bigtext in a function (or a codeunit) and you call that function (or codeunit) a lot of times, Navision doesn't free the memory for it. Not even with a CLEAR of the variable.
In the taskmanager I notice that the Navision client (or NAS) takes a huge amount of memory.
So the only way I found is to close Navision and restart.

I also have had the strange event that the taskmanager reports that a lot of memory is in use, but in the processes-list I don't find the process who has eaten the memory (even if I know it is Navision and closing Navision doesn't even free the memory).

I have also noticed that 5.0 has the same problem.

Someone has some better trick to avoid this memory loss?

ara3n

you could avoid using big text and use blob instead.

kriki

But on those, I cannot use the text-functions (STRPOS,GETSUBTEXT).

I was already thinking about an array [1..1000] of Text 1000 and program all operations I need....

ara3n

You could implement textPOS and GETSUBTEXT with blob as well.

nunomaia

Bigtext in Navision it’s a feature that has never well implemented.
It’s a feature that I always try to avoid.

kriki

ara3n wrote:

You could implement textPOS and GETSUBTEXT with blob as well.

I was more thinking about using temptables to do this.

To be honest, I don't see how to do it with a blob. Or do you mean with streaming it in text variables?.

ara3n

Yes. converting it to text variable

Lin

If your bigtext is defined as Local change it to Global that sometimes helps with memory leaks.

kriki

Lin wrote:

If your bigtext is defined as Local change it to Global that sometimes helps with memory leaks.

That was the first thing I wanted to try. Because it is something I can do quite quickly.
And if it doesn't help enough. I program a temptable to simulate bigtexts.

Solmyr

I faced with the same error, but CLEAR(BigText) was solution in my case.
I've tested it on NAV 4,5,6 and the behaviour is same. If CLEAR(BigText) is missed, memory is leaking.

Code example:

FOR j := 1 TO 300 DO BEGIN
  InFile.OPEN('C:\temp\metadata.xml');

  InFile.CREATEINSTREAM(InStr);
  BigTxt.READ(InStr);
  i := 1;
  TextLenght := BigTxt.LENGTH;
  WHILE i <= BigTxt.LENGTH DO BEGIN
    TextLine := '';
    BigTxt.GETSUBTEXT(TextLine,i,1024);
    i := i + 1024;
  END;
  InFile.CLOSE;
  CLEAR(BigTxt);
END;

frankdynamic

See KB 2728774, 2735461, 2736891