memory-error with cin and array

[Torgrim Aas]

Hi

I am using a for-loop in a 'cin' to fill an array with numbers. I
activate the 'cin' with a "latch when released" button. The first
thing that happens is that the array wont fill with the correct
numbert. The button must be pressed 3 times before the correct
numbers is in the array. Wye?

When I close the vi, the array has been changed so I'm asked if I want
to save. If I answer "yes" I get the error:

Insane object at in : {dsitem}
(0x400):FrontPanelDataController (DCO)

So I dont save, close the vi, open and run it, and then activate the
'cin' again (without reloading or purging the lsb-file) I get the the
error:

The instruction at "" references memory at "".
The memory c
ould not be "read".

When I do the above operation, the errors allways occur. Both of them
shut down the application.

The vi is only an array-indicator, two buttons for starting and
stopping, and a cin-node. Everything is in a while-loop with a 100ms
delay.

The c-kode:
CIN MgErr CINRun(TD1Hdl Array) {

int32 i;

(**Array).dimSize = 100;

for (i = 0; i < 100; i++)
(**Array).Element[i] = i*10;

return noErr;
}

Running Windows 2000pro, Visual C++ 6.0, LabView 6.02

It seems like the application wont free the memory after use. Any
ideas for solving?

Thanks,

Torgrim Aas

[JellyBeans]

You are not resizing the array size. You need to use "DSSetHandleSize" or "SetCINArraySize" function to resize the array. I usually use the DSSetHandleSize for arrays also.

CIN MgErr CINRun(TD1Hdl Array) {
int32 i,ArraySize=100;
DSSetHandleSize(array,sizeof(int)+ArraySize*sizeof(int));
(*array)->dimSize=ArraySize;
for (i = 0; i < ArraySize; i++)
(*Array)->Element[i] = i*10;
return noErr;
}

you need to have extcode.h and labview.lib for this. Hope this helps, For more details description consult the Code interface reference manual.

A Rafiq
National Instruments