open the pattern selection dialog (the icon right to Pattern Name) and see that the pattern JIS_LC20 is not available where it was in the newly created drawing ('Other predefined' - tab in the Hatch Pattern Palette dialog that opens).open the properties for the hatch on the right.see that when navigating to the available predefined patterns as above (properties -> Pattern -> Pattern Name -> Other predefined - tab) JIS_LC20 is not available.

click on the hatch on the left and see its properties.

open the attached drawing minimal_sample.dwg.

see that it is not possible to use JIS_LC20 hatch pattern in the attached drawing.

you should be able to find JIS_LC20 on the 'Other predefined' tab (third tab) of the Hatch Pattern Palette - dialog that opens.

in the 'Pattern' section in the properties, first make sure you have selected 'Predefined' as the pattern type and then click the icon on the right of Pattern Name.

select the hatch you just created and view its properties.

create a hatch (using command H, click inside the rectangle, press esc).

see that the pattern JIS_LC20 is available on your autocad as a predefined hatch pattern.

To make the matter stranger, there is a hatch in the drawing that uses the said hatch pattern and is displayed correctly. However, in the attached minimal_sample.dwg the said predefined pattern is not available for new hatches I create. When I create a new drawing this pattern is readily available in hatches I create.

not custom defined) and can be found in file acadiso.pat whose location you can find by typing (findfile 'acadiso.pat') as autocad command. The said hatch pattern is predefined (i.e. I have encountered a strange problem regarding the predefined hatch pattern JIS_LC20.

Autocad 2015 hatch pattern location