What's the best way to deal with the application not being ready

It is recommended to fine-tune the synchronization using one of the 2 available methods:

1. Global.DoSleep(1000);

Waits for 1 second. In many cases it is enough

2. Global.DoWaitFor('MyObjectId', 10000);

- Wait for given object up to 10 seconds. If object is found earlier then method unblocks.

Also you can use the following function (that you can add to your script file):

 /**
* Waits for specified value of object's property. Function returns object handle
* if object was found and specified property equals to desired value or 'false'
* in case of timeout.
* @param obj ID of object to wait for or object itself.
* @param getterName Property getter function name.
* @param propValue Desired value.
* @param [timeout = 10000] Maximum time to wait.
* @param [params] Parameters for property getter function.
* @returns Found object or 'false'.
*/
function DoWaitForProperty(/**String|SeSObject*/obj, /**String*/getterName, /**String|Number|Boolean*/ propValue, /**Number*/timeout, /**Array|String|Number|Boolean*/params) /**SeSObject|false*/
{
timeout = timeout||10000;
params = params||[];

if (typeof(params) != "object")
params = [params];

var start_ = new Date;
var waitInt = 0;
do
{
var res = null;
if (typeof(obj) == "object")
res = obj;
else
res = SeSFindObj(obj);

if(res)
{
var prop = res[getterName];
if (prop && typeof(prop) == "function")
{
var value = prop.apply(res, params);
if (value === propValue)
{
return res;
}
}
}
SeSSleep(100);
} while((new Date - start_)<timeout);
return false;
}

You can use this new function using:

 // Wait for timer to finish
DoWaitForProperty('OnlineTimerTime', 'InnerText', "00:00:00", 10000);