2.
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To select the drawing against which the expression is to be tested, click the ... option. Select the drawing from the Open dialog that is then displayed. The default location is specified on the User Options dialog (refer to File Locations).
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3.
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Click Evaluate. If the expression is invalid, and error message is displayed.
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4.
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The Status: symbol, which is also displayed on the Build tab, then indicates the validity of the expression.
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5.
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For each of the elements that the expression would be applied to were the selected diagram to be imported, the source element type is displayed in the TYPE column, the tag of the element in the drawing is displayed in the Tag field, and the attribute value would result from the application of the expression is displayed in the Result field.
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