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CAD tip # 11538:

Question CAD
% platform category

AutoCAD will not create a specific hatch in a given scale or area.

AutoCAD will hatch a selected area using a given hatch pattern but if I switch to another pattern, the hatchure disappears. This behaviour may appear just in some scales and in some areas. Why?

This may be caused by the variable HPMAXLINES - it controls how many line entities can be created in the hatch area. If you hatch a large area in the scale 1:1, a very detailed hatchure with many elements will be created. So you need to set this variable to a large number, e.g. 100000.

The behaviour is described in the following animated image. When you set the variable to 100, the hatchure is not created/displayed, but if you increase its value to 100000, it appears as expected. Used hatch pattern: AR-CONC.

In older AutoCAD versions, see also the environment variable "MaxHatch".

ACADLTCivil

* CAD

26.7.2017 3099×

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applies to: AutoCAD · AutoCAD LT · Civil 3D ·

See also:
Tip 12105:	Select the smallest DWG object - MinOf utility.
Tip 11415:	Error in pattern file. Missing parameter on line XXX.
Tip 4686:	Hatches are not displayed in long walls.

Selected tip: Which standards are used to define the look of BOM?

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