FAQ - Troubleshootings


The Astah window on my computer flickers and my PC restarts


Rendering problems can be caused by either the display driver or the Java environment.
If these problems are not solved by installing the latest version of the display driver or of Java, please try the following option:

--Dsun.java2d.d3d=false

  1. Open "astah-pro.l4j.ini" file with text editor which you can find in Astah Installation folder
  2. Find this line "-Dsun.java2d.d3d=false"​ ​and add "#" in front of this line to comment-out

    (​Before)​ ​-Dsun.java2d.d3d=false
    (After) #-Dsun.java2d.d3d=false

  3. Overwrite this file and run Astah Professional