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| <a name="g_t_002efail-expression"></a> |
| <h3 class="section">7.52 <code>.fail <var>expression</var></code></h3> |
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| <a name="index-fail-directive"></a> |
| <p>Generates an error or a warning. If the value of the <var>expression</var> is 500 |
| or more, <code>as</code> will print a warning message. If the value is less |
| than 500, <code>as</code> will print an error message. The message will |
| include the value of <var>expression</var>. This can occasionally be useful inside |
| complex nested macros or conditional assembly. |
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