Unregistered RegApps need to be purged from a file in order to remove them from the drawing’s database. Because the RegApp remains after the object has been deleted, it’s an extra bit of data that contributes to larger file sizes and negatively impacts performance of a drawing. Unreferenced RegApps appear in a drawing when the original objects that contained XDATA are deleted from the file.
In the case of RegApps, according to Autodesk, RegApp is short for “registered application." It is linked to “extended entity data” (XDATA) that is attached to drawing objects through use of Autodesk’s provided APIs. Scale Lists should be cleaned of excess scale values when possible. This can add tens or even 100+ scales to an existing drawing, many of which aren’t necessary for final plan sets.
Scale lists are also updated to include scales from external reference (XREF) files and other objects that contain scales that were not previously defined in the drawing’s original Scale List. In order for a scale to be selected, it must be defined and included on the list. Scale Lists can also be used to quickly set a scale for viewports created in a layout tab. Scales can easily be selected from the list to automatically resize any annotative content, like lineweights and annotative text, dimensions, and multi-leaders. The AutoCAD Scale List is a list of pre-defined drawing and annotation scales that are saved in a drawing file. When the number of these items in a file increases, so does the file size, which hinders drawing performance. Two of the most common contributors to abnormal file size and poor drawing performance are Scale Lists, and RegApps. When these types of issues occur, one of the first things we look at is file size (is the file larger than expected) and file cleanup tools.
The Ideate tech team has seen a recent increase in cases related to poor performance, slow opening and saving of files, and a number of crashes when using basic AutoCAD commands. Posted on FebruAuthor: Matt Miyamoto AutoCAD