Error Handling Tool
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Error Handling Definition
The content you requested has been removed. You’ll be auto redirected in 1 second. Windows Automotive 5.0 and error handling best practices 5.5 Using Windows Automotive 8 Error Handling Tool 8 Error Handling Tool 8.3 Error Handling Tool Samples 8.3 Error Handling Tool Samples 8.3 Error Handling Tool Samples 8.1 data error handling Overview 8.2 Components of the Tool 8.3 Error Handling Tool Samples 8.3.1 General Error Handling 8.3.2 Exception Error Handling 8.3.3 TFAT Error Handling 8.3.4 System Monitoring Tool Error Handling TOC Collapse the table of content Expand the table of content This documentation is archived and is not being maintained. This documentation is archived and is not being maintained.
Error Handling Techniques
8.3 Error Handling Tool Samples The Error Handling Tool includes following samples for performing error handling using this framework. 8.3.1 General Error Handling 8.3.2 Exception Error Handling 8.3.3 TFAT Error Handling 8.3.4 System Monitoring Tool Error Handling Community Additions ADD Show: Inherited Protected Print Export (0) Print Export (0) Share IN THIS ARTICLE Is this page helpful? Yes No Additional feedback? 1500 characters remaining Submit Skip this Thank you! We appreciate your feedback. Dev centers Windows Office Visual Studio Microsoft Azure More... Learning resources Microsoft Virtual Academy Channel 9 MSDN Magazine Community Forums Blogs Codeplex Support Self support Programs BizSpark (for startups) Microsoft Imagine (for students) United States (English) Newsletter Privacy & cookies Terms of use Trademarks © 2016 Microsoft © 2016 Microsoft
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Error Handling In C
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lots of Python script tools. Since other people were going to use these tools, I wanted my error handling to be robust and informative. This post is about some tips and tricks I https://blogs.esri.com/esri/arcgis/2008/12/01/tips-and-tricks-error-handling-in-python-script-tools/ discovered during this project. Error handling basics The basics of handling Python errors are http://pro.arcgis.com/en/pro-app/arcpy/get-started/error-handling-with-python.htm covered in the 9.3 help topic Error handling with Python. The Python.org document Errors and Exceptions has more detailed information. Tip #1 - Use the arcgisscripting.ExecuteError exception In version 9.2, we introduced the arcgisscripting object along with a new exception class, arcgisscripting.ExecuteError. (This arcgisscripting.ExecuteError exception class wasn't documented in version 9.2, so few people knew about error handling it.) The arcgisscripting.ExecuteError exception is thrown whenever a geoprocessing tool or geoprocessing function encounters an error. What this means is that you can divide errors into two groups, geoprocessing errors (those that throw the arcgisscripting.ExecuteError exception) and everything else. You can then handle the errors differently, as demonstrated in the code below: import arcgisscripting gp = arcgisscripting.create(9.3) try: result = gp.getcount("C:/blah.shp") # x = y # Return GEOPROCESSING specific error handling tool errors # except arcgisscripting.ExecuteError: gp.AddError(gp.GetMessages(2)) # Return any PYTHON or system specific errors # except: gp.AddError("Python or system error occurred") The code above is used as the source for a script tool. To keep things simple, the script tool has no parameters. When the script tool is executed, the call to getcount produces an error because the dataset "C:/blah.shp" doesn't exist. As a result, the progress dialog looks as follows: To prove how geoprocessing errors and Python errors are handled differently, change the two lines of code as follows: # result = gp.getcount("C:/blah.shp") x = y Now when the script is executed, an error will occur because the variable ‘y' is undefined, and the progress dialog will display as follows: Tip #2 - Beware of getting error messages from a result object Before moving on, a quick word about the result object, shown below: result = gp.getcount("C:/blah.shp") If the call to getcount above raises an exception, the result object is null. This means you cannot retrieve error messages from the result object. For example: import arcgisscripting gp = arcgisscripting.create(9.3) try: result = gp.getcount("C:/blah.shp") # Return GEOPROCESSING specific errors # (this method is INCORRECT!) except arcgisscripting.ExecuteError: gp.AddError(result.GetMessages(2)) # Return any PYTHON or system specific errors # except: g
for Developers Tools to build location-aware apps ArcGIS Solutions Free template maps and apps for your industry ArcGIS Marketplace Get apps and data for your organization Documentation Pricing Support Esri Sign In user My Profile Sign Out Go ArcGIS Pro HomeGet StartedHelpTool ReferenceArcPySDKCommunity Error handling with Python try-except statementraise statementExecuteError classtraceback Getting error messages from a result object Errors happen. Writing scripts that expect and handle errors can save time and frustration. When a tool returns an error message, ArcPy generates a system error or exception. In Python, you can provide a variety of structures and methods that can handle exceptions. Of course, a script can fail for other reasons not related to a geoprocessing tool. These also need to be caught and dealt with in an appropriate manner. The following sections offer a few techniques that introduce the basics of Python exception handling.When a tool writes an error message, ArcPy generates an arcpy.ExecuteError exception. Python allows you to write a routine that automatically runs when a system error is generated. In this error-handling routine, retrieve the error message from ArcPy and react accordingly. If a script does not have an error-handling routine, it fails immediately, which decreases its robustness. Use error-handling routines to manage errors and improve a script's usability.Geoprocessing tool error messages are accompanied by a six-digit code. These ID codes have been documented to provide additional information on their cause and how they can be dealt with.try-except statementA try-except statement can be used to wrap entire programs or just particular portions of code to trap and identify errors. If an error occurs within the try statement, an exception is raised, and the code under the except statement is executed. Using a basic except statement is the most basic form of error handling.In the following code, Buffer fails because the required buffer_distance_or_field argument has not been provided. Instead of failing without explanation, the except statement is used to trap the error, then fetch and print the error message generated by Buffer. Note that the except block is only executed if Buffer returns an error.import arcpy import