I'm getting the following error when I try to run an ASP.Net page. It just popped up during development, and I don't know what the cause is.
"OverflowException Occurred. Value was either too large or too small for an Int32."
The line the debugger breaks on is of absolutely no help at all
Dim ApproxDate As TextBox = FormView1.FindControl("CurrentResultDateTextBox")
The error is occurring on this line because calling findControl on FormView1 causes it to databind (executes a SQL query to return the dataset). I assume the error lies somewhere in one of the object data sources or possibly one of the grid views on the page, but the debugger won't tell me where. Most of the page data sources are bound declaratively (specified in ASP tags in the source)
Pressing F11 to run past the exception displays the following:
"13712696100373320501120906 is not a valid value for Int32."
The value being shown here is the primary key for the main SQL table used by the page. There are about 10 data sources which use this field. Again, there's no indication of where exactly the error is occurring.
So how can I debug an error like this? Are there commands I can run? IIS error logs? 3rd party software to capture the error? I'll take anything I can get
Managed to find the problem. The trick is to first disable "just my code" in the IDE/Debug settings. Then you can see the system functions on the call stack, and while there is no source code, you can click on these functions to unwind the stack to one of the web controls (in this case the ListControl.PerformSelect function)
If you check the auto variables in the debug window, it will show the control involved in the error. From there I added a watch on the ID property to see which control it was, looked up the data source that feeds it, and found the error.
You can also unwind the stack to the ObjectDataSourceView, look at the dataTable property, and call GetErrors() to see the issues. This returns an array of data rows which are flagging errors; The property RowError will show the error message for any given row.
Related
I would like to know where is this error code located in the AOT. Would like to know the path to understand the structure and develop custom code.
Transaction has been selected, for settlement, although settlement type: none was selected
I generally use one of two methods to locate message strings.
Provided the cross reference is updated (it should be in dev) use the "Label editor" to to search for then string, see this answer.
Put a breakpoint in top of info.add method, disable CIL if needed, then rerun to get the error message invoking the debugger, see this answer.
I have downloaded the Alexa Skills online tutorial found at:
https://github.com/amzn/alexa-skills-kit-js/blob/master/samples/reindeerGames/src/index.js
and followed (I think) all of the instructions in the tutorial found at:
https://developer.amazon.com/public/community/post/TxDJWS16KUPVKO/New-Alexa-Skills-Kit-Template-Build-a-Trivia-Skill-in-under-an-Hour
This is meant to be a tutorial for first time Alexa Skills developers. My question is, I get this error message once I hit the "Save and Test" button:
errorMessage": "Exception: TypeError: Cannot read property 'application' of undefined"
Does anyone know what the above error means or how to get rid of it?
Thanks v much.
This looks like a javascript error telling you that you are trying to use a property named application on an undefined variable.
JavaScript assigns the value "undefined" to any variable that you use but haven't set yet.
There are a several ways that you can debug problems in your Lambdas. Perhaps the easiest is to review the Logs. To do this:
Go to the Lambda console (where you upload your code to Lambda)
Select the Monitoring tab
Select "View logs in CloudWatch" (in the upper right)
Review the latest log, looking for a reported error in one of your files (typically index.js) and specifically the line number. That should help you find the error.
Note that the time stamps will be GMT, so probably won't match your actual time. This can be confusing if you have multiple entries. But the minutes should match, helping you verify that you're looking at the correct log entry.
A more advanced, and quicker way to debug Lambda problems, is the include a "test" request, and run this each time you upload code to Lambda.
To set this up:
Run one of your defined utterances in the ASK test page under the "Service Simulator" section.
Copy the code displayed below that in the "Lambda Request" section.
Now switch to the Lambda console for your Lambda function
Click the down arrow in the Actions button and select "Configure test event"
Paste the request you copied above into the text field
Click Save and Test.
Now each time you upload new code to Lambda, you can select "Test" and the request that you just saved will be run.
And best of all, the console log will be displayed in the lower right corner, saving you from having to switch to the logs and refresh to view them.
I did all the steps from this waltrought:
http://blogs.msdn.com/b/sqlforum/archive/2011/01/03/walkthrough-add-a-subreport-in-local-report-in-reportviewer.aspx
and when i run it i get the first father report and instead the sub
report i get:
Data retrieval failed for the subreport, 'Subreport5',
located at: C:...
i attach a print screen file
i am using VS2010 framework 3.5.
Can you run the subreport by itself, given the right parameters? If you can't, your problem is that.
If you can run it successfully by itself, double-check that you are passing the parameters correctly to your subreport. Make sure the parameter types match and that you are passing all of them.
Another problem might be that -- if I recall correctly -- when you have a subreport in a local report, you need to provide the data for the subreport programmatically, just as you do with the parent report. There's an event that's raised - SubreportProcessingEvent -- when the subreport is being processed. You write a handler for that event and supply data in the handler. Here's some more information about it: LocalReport.SubReportProcessingEvent. There's a good example on that page.
I'm doing the Wicked Code implementation of SqlSiteMapProvider, except in VB.NET.
There's a few things with the code that are causing issues, and I don't understand how it is supposed to work the way it's written in the article. I've provided the code straight from the article provided below. I've pasted the code here for ease of viewing
First issue - the depedency is instantiated BEFORE (lines 134-137) the tree is created (151-160) - so as soon as you add the depedency to the http.cache (165-167), the OnSiteMapChanged event (242) fires immmediately - making the entire proccess run again - and this loops many times until finally something makes it stop. (i stepped through it and counted the code looping at least 20 times before I gave up on trying to guess when it hit last)
OK, so to fix this I just moved the code to the create the dependency to AFTER the tree is built, right before inserting to http.cache (so HasChanged property is false when adding to http.cache, and you don't get stuck in this psuedo-ifinite-loop).
I still have a problem though - every time a page loads, the BuildSiteMap() hits and line 121 checks if _root is not null - it seems it is never null after it is first built... this is good because I don't want to hit the DB each time. Now, I insert a record into the table... the OnSiteMapChanged event never fires. As I browse pages on the app, the sitemap does not reflect the newly inserted record - stepping through the code, I see that the check at line 121 is still causing the function to short circuit... The sitemap will only refresh if i re-start Visual Studio, which causes the private _root field to become null again, and re-builds the sitemap, reflecting the new changes.. (refreshing the browser or starting new browser instances does not work)...
EDIT: THE ISSUE STEMMED FROM A SILLY 'SET NOCOUNT ON' LINE IN THE TOP OF MY STORED PROC. APPARENTLY THIS BREAKS THE QUERY NOTIFICATION. It seems that this statement is seen as a result set and that the second, actual query statement invalidates the result set resulting in a notification. This was very hard to find and nowhere in the MSDN documentation until I added the comment. Hope this saves someone else the miser I went through!
THE ISSUE STEMMED FROM A SILLY 'SET NOCOUNT ON' LINE IN THE TOP OF MY STORED PROC. APPARENTLY THIS BREAKS THE QUERY NOTIFICATION. It seems that this statement is seen as a result set and that the second, actual query statement invalidates the result set resulting in a notification. This was very hard to find and nowhere in the MSDN documentation until I added the comment. Hope this saves someone else the miser I went through!
I have a weird problem where the "Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints." error sometimes pops up when I am trying to build my project.
The line in question throwing the error was auto-generated code in the designer file for the dataset. To find out the offending table, I used the following code:
Try
Me.Adapter.Fill(dataTable) <--Breakpoint here on the offending line
Catch ex As Exception
For Each TRow As DataRow In dataTable.Rows
If TRow.HasErrors Then
Trace.Write(TRow.RowError)
End If
Next
End Try
Funnily enough, as soon as I run the project after putting in the above code and breakpoint, the error disappears. I assume this has something to do with the code being regenerated. All data is presented successfully, and the project compiles without errors.
However, this has happened often enough for me to frustrate me. Anybody know what might be causing the error and how I can isolate it?
What unique constraint are you placing on the datatable and have you verified that the data your passing in doesn't have any duplicates? If this is coming from a shared database perhaps someone else is modifying the data which could be causing the randomness.
Edit
If that code is exactly as what you have (And forgive me my vb.net is not as strong as my C#). Wouldn't it swallow the exception? In C# we need to rethrow the error.
Add a Trace.Write() right before you go into your for loop.
You are probably working with a typed dataset, or have some code configuration on it. Also you might be reading from one table, and then adding data from another.
In any of those cases, you really want to look into any inconsistencies between the schema. If it is a typed dataset / or configured in code, check its definition, and look for anything different from the sql table. If you are reading from 2 different tables, check the definition of both tables.
Figured it out finally!
The reason the breakpoint wasn't being hit was because the code in question was auto-generated, and had the attribute "DebuggerNonUserCodeAttribute". In addition, in my VS settings, I had set the debugger to "Just my code".
When I ran the code again, and the breakpoint wasn't hit, I noticed the breakpoint icon had changed to a warning. Hovering showed this:
"The breakpoint will currently not be hit. Breakpoints cannot be set in a method or class with the 'DebuggerNonUserCode' attribute when the debugger option 'Just My Code' is enabled."
Ouch!
Once I had removed the "Just My Code" debugging option, the breakpoint was hit, and I discovered that one of the rows had a NULL value in one of the columns which had a non-null constraint. Stupid ole' me!
You should use this code before you fill DataTable :
var dt = new System.DataTable.DataTable();
dt.Clear();
dt.Rows.Clear();
dt.Columns.Clear();