How Do I ... : Test and debug my application : Debug my scripts : Find the coding error : Find the error if I ran my application
Find the error if I ran my application
Find the coding errorFind the coding errorTip: See if the script is in the classTip: See if the script is in the classNo example for this topicFind the error if I used Execute, Display, or InspectFind the error if I used Execute, Display, or Inspect
If a Script Debugger opens when running your application or code, the error message in the upper-left pane commonly reads:
<object> does not understand <message>
To find the error, look at the message stack (middle-left pane). Find the lowest ExceptionalEvent>>#signalWith: message. (It's close to the top of the stack.) Not far below is the message doesNotUnderstand. Click on the message just below doesNotUnderstand; the expression that caused the error is shown, highlighted, in the description (bottom) pane. In many cases, this message will already be selected when the Debugger opens.
Once you find the cause of the error, look at the variables and their values in the upper-right panes. You might need to compare the variables of several scripts to pinpoint what part of the code needs to be fixed.
Last modified date: 08/12/2019