Interpreting System Console

Hello everybody,

I have a model where I'm creating Items with the OnMessage-Trigger, just like this:

treenodecurrent = ownerobject(c);
int nNumitems = 2;
int nFlowitemrank = 6;
treenode pDestination = current;
int nLoadingPosition = 1;
closeoutput(current);
for (int nIndex = 0; nIndex < nNumitems; nIndex++)
{
insertcopy(first(rank(node("/Tools/FlowItemBin",model()),nFlowitemrank)), pDestination);
setitemtype(rank(current,content(current)),msgparam(1));
setlabelnum(item,"Loading_Position",nLoadingPosition);
nLoadingPosition = nLoadingPosition +1;
}
openoutput(current);

The System console tells me following:

The label named "Loading_Position" was referenced but does not exist on (null)

The Label is defined at the FlowItemBin, the spelling is also right.

Is it right that the label can't be setted because the item isn't actual created? Could ypu please give me tipps that I can solve the problem?

Thank you.

Greetings,
FlorianK

insertcopy() returns a reference to the item that is created

treenode newitem = insertcopy(...);

Take a look at the code behind the OnMessage pick option called "Create Flowitems"

Originally Posted by FlorianK

setlabelnum(item,"Loading_Position",nLoadingPosition);

You never defined "item" so it is null. You are trying to set the "Loading_Position" label on null.

You should use:

insertcopy(first(rank(node("/Tools/FlowItemBin",model()),nFlowitemrank)), pDestination);
setitemtype(rank(current,content(current)),msgparam(1));
setlabelnum(rank(current,content(current)),"Loading_Position",nLoadingPosition);
nLoadingPosition = nLoadingPosition +1;

or

treenode newitem = insertcopy(first(rank(node("/Tools/FlowItemBin",model()),nFlowitemrank)), pDestination);
setitemtype(newitem,msgparam(1));
setlabelnum(newitem,"Loading_Position",nLoadingPosition);
nLoadingPosition = nLoadingPosition +1;

Hello Chris,

thanks for your hint with the treenod.

While Phil wrote athe example codes, I was able to understand it and made it the same way

=> treenode newitem = insertcopy(first(rank(node("/Tools/FlowItemBin",model()),nFlowitemrank)), pDestination);

Thank you both for your help.