Basic Error handling

[wisem2540]

I am using $oTable = _IETableGetCollection($oIE, 1) in a loop every hour and writing data to a text file.  Occasionally my script will error out with the following...

It looks to me that it has an issue reading the table.  So I basically just want to ignore the error and try again.  Maybe a do-until makes sense?

 

>"C:\Program Files\AutoIt3\SciTE\..\autoit3.exe" /ErrorStdOut "C:\Scripts\Script.au3"    
"C:\Program Files\AutoIt3\Include\IE.au3" (1508) : ==> The requested action with this object has failed.:
Case $iIndex > -1 And $iIndex < $oObject.document.GetElementsByTagName("table").length
Case $iIndex > -1 A
nd $iIndex < $oObject.document^ ERROR
>Exit code: 1    Time: 83.41

[Au3Builder]

$oTable =  _IETableGetCollection($oIE, 1 )

If @error then

;do nothing

else

your part of a script.

Edited February 6, 2018 by Au3Builder

[wisem2540]

I changed it to....

DO

Sleep (500)
Local $oTable = _IETableGetCollection($oIE, 1)
Local $aTableData = _IETableWriteToArray($oTable)
Until IsArray($atabledata)

 

But I still feel like if that line in the Include errors out that it will throw an exception and stop the script

 

EDIT:  Yes indeed it does.  For that reason, I do not think @error would solve this for me either

Edited February 6, 2018 by wisem2540

[AdamUL]

Since you said it is in a loop, the you can use ContinueLoop.  

$oTable = _IETableGetCollection($oIE, 1)
If @error Then ContinueLoop

Another way, is to check if $oTable is an Object.  

If Not IsObj($oTable) Then ContinueLoop

 

Adam

[Au3Builder]

I would try to reset Internet Explorer settings,first.

https://support.microsoft.com/en-us/help/923737/how-to-reset-internet-explorer-settings

Next add to your script to make sure every thing goes right.

If @error  or not IsArray($atabledata)  then continue Loop

Edited February 6, 2018 by Au3Builder

[wisem2540]

Guys,

I am already using a do-until as noted (rather than contiueloop) and its still not functioning.  I changed the script to a continuous loop with a brief pause for testing.  It runs a few dozen times before erroring, so I do not think this is an IE settings issue.  Since the error is happening inside the IE.au3 include, I believe these options are missing the mark.  I remember building an error handling function some time ago, but I do not remember how I did it

Edited February 6, 2018 by wisem2540

[jdelaney]

Add in an error handler.  sometimes the dom object is inaccessible, and then when you try to get a property or child object, the script will blow up.   _ieerrorhandlerregister, or something like that.

[Au3Builder]

there is a possibility that the ie library needs fixing.It's also hard to say what stops your script without testing the script yourself.I realize this is more like workaround than solution however it might do the job.You can spawn a bat script to constantly monitor if your app process is alive.If not,then runs compiled script once more.

[jdelaney]

I agree.   there should be error handling in the ie functions validating objects prior to diving into them.   but the workaround is to turn on the COM error handler as I mentioned

 

Edited February 6, 2018 by jdelaney

[wisem2540]

37 minutes ago, jdelaney said:

Add in an error handler.  sometimes the dom object is inaccessible, and then when you try to get a property or child object, the script will blow up.   _ieerrorhandlerregister, or something like that.

I did find this via a google search and I am experimenting with it now.  It should be enough for me to just call an empty function right?  Assuming that I wish to do nothing but ignore the error.  In theory, my do-until loop would handle everything

 

EDIT:  Closer, but no matter what I try, I continue to see this in the console and the script crashes.  But it seems to be capturing the error at least

 

>"C:\Program Files\AutoIt3\SciTE\..\autoit3.exe" /ErrorStdOut "C:\Scripts\xxx.au3"    
--> IE.au3 T3.0-2 Warning from function _IETableGetCollection, $_IESTATUS_NoMatch
--> IE.au3 T3.0-2 Error from function _IETableWriteToArray, $_IESTATUS_InvalidDataType
--> IE.au3 T3.0-2 Warning from function _IETableGetCollection, $_IESTATUS_NoMatch
--> IE.au3 T3.0-2 Error from function _IETableWriteToArray, $_IESTATUS_InvalidDataType
--> IE.au3 T3.0-2 Warning from function _IETableGetCollection, $_IESTATUS_NoMatch
--> IE.au3 T3.0-2 Error from function _IETableWriteToArray, $_IESTATUS_InvalidDataType
--> IE.au3 T3.0-2 Warning from function _IETableGetCollection, $_IESTATUS_NoMatch
--> IE.au3 T3.0-2 Error from function _IETableWriteToArray, $_IESTATUS_InvalidDataType
>Exit code: 3221225477    Time: 253.5
 

Edited February 6, 2018 by wisem2540

[Earthshine]

maybe the browser is busy refreshing or whatever it does in the background. maybe try monitor that process to see when cpu is idle for browser before automating?

[jdelaney]

Looks like it broke out of the loop.  Are you sure the script didn't eventually find the table?  Add in some consolewrite for debugging.

Need to see the script to know for sure.

Edited February 7, 2018 by jdelaney