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Class

# RbScriptAlreadyRunningException

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## Description

Occurs if the user tries to modify an `RBScript's</api/language/xojo_script/xojoscript>` source code while it is running or you try to change the Context object while the script is running. Don't do this.

## Properties

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| Name                                                       | Type                               | Read-Only | Shared |
|------------------------------------------------------------|------------------------------------|-----------|--------|
| `ErrorNumber<rbscriptalreadyrunningexception.errornumber>` | `Integer</api/data_types/integer>` |           |        |
| `Message<rbscriptalreadyrunningexception.message>`         | `String</api/data_types/string>`   |           |        |

## Methods

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| Name                                                        | Parameters                                                                                            | Returns                                  | Shared |
|-------------------------------------------------------------|-------------------------------------------------------------------------------------------------------|------------------------------------------|--------|
| `Constructor<rbscriptalreadyrunningexception.constructor0>` | message As `String</api/data_types/string>` = "", errorCode As `Integer</api/data_types/integer>` = 0 |                                          |        |
| `Stack<rbscriptalreadyrunningexception.stack>`              |                                                                                                       | `String</api/data_types/string>`         |        |
| `StackFrames<rbscriptalreadyrunningexception.stackframes>`  |                                                                                                       | `StackFrame</api/exceptions/stackframe>` |        |

## Property descriptions

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RbScriptAlreadyRunningException.ErrorNumber

**ErrorNumber** As `Integer</api/data_types/integer>`

Used to contain an error number that describes the runtime error.

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RbScriptAlreadyRunningException.Message

**Message** As `String</api/data_types/string>`

Used to contain descriptive text to display when the runtime exception is encountered.

## Method descriptions

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RbScriptAlreadyRunningException.Constructor

**Constructor**(message As `String</api/data_types/string>` = "", errorCode As `Integer</api/data_types/integer>` = 0)

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`Constructors</api/language/constructor>` are special methods called when you create an object with the `New</api/language/new>` keyword and pass in the parameters above.

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Used to raise your own `RuntimeException</api/exceptions/runtimeexception>` with a message and optional error code.

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RbScriptAlreadyRunningException.Stack

**Stack** As `String</api/data_types/string>`

Returns a `String</api/data_types/string>` array that contains a list of all of the methods in the stack from the main entrypoint to the point at which the exception was invoked.

The stack contains all the method names up and including the current method name.

This feature only works if the **IncludeFunctionNames** property on the App object is selected in the Shared Build Settings.

In addition to your own method calls, you will also see framework method calls, but these may not always be completely accurate due to insufficient symbols for the OS to resolve.

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RbScriptAlreadyRunningException.StackFrames

**StackFrames** As `StackFrame</api/exceptions/stackframe>`

Returns an array containing the stack when the exception was first raised.

## Compatibility

All project types on all supported operating systems.

## See also

`RuntimeException</api/exceptions/runtimeexception>` parent class; `XojoScript</api/language/xojo_script/xojoscript>` class; `Exception</api/exceptions/exception>`, `Try</api/language/try>` statements.
