FAQs

Please see the installation guide for your operating system:

• How to install Astah System Safety on Windows
• How to install Astah System Safety on macOS

Astah System Safety supports English and Japanese. It starts in English unless your PC’s language and region settings are Japanese. To switch to Japanese:

Windows

1. Close Astah System Safety if it is running.
2. Open the astahsystemsafety.l4j.ini file in the Astah System Safety installation folder with a text editor.
3. Add the following two lines and save the file:

   -Duser.language=ja
   -Duser.country=JP

4. Launch Astah System Safety. It starts in Japanese.

Mac

Astah System Safety follows the language and region settings of macOS. If they are set to something other than Japanese, Astah System Safety starts in English. To use Astah System Safety in Japanese, set Japanese as the preferred language in [System Settings] – [General] – [Language & Region], then restart Astah System Safety.

Windows

1. In the search box on the taskbar, type Control Panel and select it from the results.
2. Select Programs > Programs and Features.
3. Right-click Astah System Safety (or press and hold) and select Uninstall or Uninstall/Change. Then follow the directions on the screen.

Mac

1. Find Astah System Safety in the Finder. It is usually in the Applications folder.
2. Drag the app to the Trash, or select the app and choose [File] – [Move to Trash].
3. If you are asked for a user name and password, enter the name and password of an administrator account on your Mac.
4. To delete Astah System Safety completely, empty the Trash.
   

Please see the Astah System Safety system requirements.

Windows and macOS. See the system requirements for details.

Linux is not supported. If you would like to use Astah System Safety on Linux, please let us know; we will consider it for the future.

Astah System Safety supports STAMP/STPA, GSN (Goal Structuring Notation) and ASAM SCDL, together with SysML and UAF in the same model. It can be used to create safety cases for standards such as ISO 26262.

FTA, FMEA and simulation are not included.

No. Astah System Safety does not run simulations of SysML models. You can use the Astah API to extract the model information you need and pass it to a separate simulation tool.

Yes. There are two ways.

Export as an image file

1. Go to [File] – [Export Image] in the main menu.
2. Export the diagram as a BMP, PNG, EMF, or SVG file.
3. Insert the image file into your Word, Excel, or PowerPoint document.

Copy to the clipboard

1. Select the elements on the diagram.
2. Go to [Edit] – [Copy to Clipboard] in the main menu.
3. Paste into your Word, Excel, or PowerPoint document.

Image quality: vector formats (EMF and SVG) stay sharp when scaled, so they are recommended over BMP and PNG.

Note: ungrouping the pasted images in Word and Excel is not supported.

Yes. There are two ways.

One table at a time

1. Open the table.
2. Click the [Export to Excel] button at the upper right of the table.
   

All STAMP/STPA tables at once

Go to [File] – [Export] – [STAMP/STPA Tables to Excel].

Yes. Astah System Safety 11 and later supports the Assurance Claim Point (ACP) notation.

Yes. You can import your ASCE GSN models with a dedicated import script, and continue editing your existing safety arguments in Astah.

• How to use the Script Editor
• Script to import ASCE GSN models

We have partnered with several training and consulting companies that offer training for Astah products, both in person and online. See our partner page and contact a partner directly.

For training with Astah System Safety:

• Third Exploration (Beijing) Technology Co., Ltd.: Automated Driving Systems Safety, Systems Safety Analysis, Safety Systems Engineering

The performance of Astah System Safety depends on the memory (RAM) of your machine. Try the following:

1. Turn off the mouse cursor tracing option

In some environments, this option makes drawing on the diagram slower.

2. Tune the Java memory (heap size) settings

You can change when Java runs garbage collection with Java’s non-standard options.

Windows

1. Close Astah System Safety.
2. Open the astahsystemsafety.l4j.ini file in the Astah System Safety installation folder with a text editor. If you do not have permission to edit the file, open it as an administrator.
3. Set the heap size, save the file, and restart Astah System Safety. For example:

   -Xms16m
   -Xmx512m

Mac

1. Close Astah System Safety.
2. Open Terminal and run the following command (this example sets the maximum heap size to 2048m):
   defaults write com.change-vision.astahsystemsafety /com/change-vision/astahsystemsafety/ -dict-add JVMOptions/ '{ "Xmx" = "-Xmx2048m"; }'

See also Why is Astah System Safety running slowly?

This can happen when many diagrams and tables are open at the same time. Close the ones you are not using. To close several at once, right-click a diagram or table tab and choose an option from the close menu.

Also make sure Astah System Safety is up to date and that your computer meets the system requirements. If the issue continues, restart Astah System Safety.