Hi folks, as obvious with its title, we'll discuss in this thread a simple method to handle some errors in Qlik.
To explain today's aim in better words , we sometimes, due to some performance issues, have throwns errors while trying to connect to our source (especially when it comes to Web Services... that was the case for me unfortunately !)
But, when I try to connect again, the connection is made..
So basically, sometimes, if we wait a little bit, and try to perform the connection again, it works... (strange, but true !)
With that in mind, and as Qlikers know, in case of an error, Qlik will automatically stop the data reloading process.. and thus, the application won't be reloaded due to a performance issue...
Now just imagine, that this was a nearly every day thing, and so, each day, you'll be surprised by the failure of the reloading task of your application (due to performance issues) and having to face angry emails from users not happy with the application not up to date... Yeah, not the best way to start a day !
But, every problem has its solution; and the best way to counter this one, is to handle this error the right way.
So basically, instead of having an error, It would be better to automatically try to connect again and again untill the connection is made. With that, we'll be sure the application is reloaded and that users are happy.
No, not like that but instead?
=> A combination of ErrorMode and scripterror
LET ErrorMode=0; //With this, Qlik won't kill the reloading process if there is an error
Load * from yourSource; // try to connect to ur source and import data
if ScriptError >0 //if there an error
for vLoop=1 to 10
sleep 5000; // wait 5 seconds and try to reconnect untill the connection is made
Load * from yourSource;
if scripterror=0 then //if there is no error, we don't try to reconnect
LET ErrorMode=1; //roll back to the normal Qlik's behaviour when It comes to handling errors
Hope that was helpful !