Error while Linetype drop-down selected

When I select the Linetype drop-down list either from Properties toolbar or from Properties window, the following error message is displayed:

FATAL ERROR: Unhandled Access Violation Reading 0x0020 Exception at XXXXXXXh

Hi Barto,
Instead of assigning linetypes directly as an object property through the Linetype drop-down list try to use the Layer Manager to load and assign linetypes to drawing objects by layer. When you assign linetypes by layer, the linetype is associated with the drawing object through the layer it resides on, rather than assigning to the object directly.
Hope this will some what help you. Have a nice day.