Don't know what the original value of the label is but I will assume it was an empty string or possibly text. You most likely were trying to increment a value that was NaN (Not A Number).

FYI, It's Lyndel (one L at the end) and Barry, not Lyndell and Gordon.

Try this

onHold = function()
{
var x = CF.widget("COUNTER", "SCRIPTS", "RESOURCES");
var counter = 0;
if (x) counter = parseInt(x.label,10);
if (isNaN(counter)) counter = 0;

//bla bla
//some conditions
counter++;
x.label = String(counter).valueOf();
System.print(counter +"-"+ x.label);
};
onHoldInterval = 300;