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About Modifying Accuracy Settings in Assembly
You can modify accuracy settings in Assembly, Part, and Manufacturing modes. When geometry is copied from one part to another with different absolute accuracy, the source geometry can be invalid for the destination part. For more information about modifying part accuracy settings, search the Help Center.
An assembly can have an accuracy setting that is incompatible with that of a part. For example, an assembly hole or cut feature may not display because the accuracy settings of intersected parts are too high. When assembly accuracy and part accuracy differ, you can easily reset accuracy settings at the assembly level.
The configuration file option enable_absolute_accuracy must be set to yes to enable modification of absolute accuracy in Assembly mode.
When the configuration file option enable_absolute_accuracy is set to no, you can only modify relative accuracy. The system displays the current relative accuracy of the active model and prompts you to change it. The default setting is 0.0012.
When the configuration file option enable_absolute_accuracy is set to yes, the Accuracy dialog box contains the Relative and Absolute options.