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**************
script_error()
**************
Purpose
=======
script_error()
Returns the error state of functions that support it. C-Developers note that this
is similar to ``errno`` under Linux. The error state corresponds to the function
immediately called before. The next function call overrides it.
Right now, the value 0 means that that the previous functions succeeded, any other
value that it failed. In the future, we may have more fine-grain error codes.
Function descriptions mention if a function supports error state information. If not,
the function call will always set ``script_error()`` to 0.
Example
=======
The following example shows that script_error() only needs to be called and does
not need any parameters.
.. code-block:: none
script_error()
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