Get answers to your frequently asked questions about Astah Professional.
Yes. Academic pricing is available to qualified academic institutions. See the Academic Pricing page.
Yes, please send us a quote request through this form.
Followings can be documentation that prove licenses’s academic status:
You will receive an email from our online store – email@example.com 10 days before your subscription license expires. To cancel, access the link in the email and press [Cancel Subscription].
If you cannot find the email, please contact us to ask for a cancellation of the subscription.
You will be able to continue to use Astah.
However you will not be able to upgrade to newer versions or receive all the benefits the support offers.
All the users can continue to use Astah but unsupported.
You won’t be able to update to the newer version and lose all the benefits plus your access to license portal.
Therefore, when support is not renewed, a number of Individual Perpetual Licenses will be issued and delivered to the license administrator for distribution. These licenses will allow for continued use of Astah, but will be un-supported.
Yes. You can still renew, however you will need more than one Support Renewal License to bring your support period up to date. (e.g. If your support expired one and a half years ago, you will need two Support Renewal Licenses.)
Yes. You can still renew. Please contact us in this case.
Yes, use the command below.
e.g: Installing Astah Professional 8.2
If you would like to install Astah to a specific directory, use /DIR option.
astah-professional-8_2_0-66631d-jre-64bit-setup.exe /verysilent /DIR=”the destination of installataion folder
Please refer to Astah Professional System Requirement page.
The performance level of Astah depends on the RAM capacity of your machine.
Try the following methods if you have not tried them yet:
Refer to the How to use a specific version of the JavaVM and use the latest version of Java.
If you are on Mac, hiding title bar seems effective in some environments.
Go to [Tools] – [System Properties] – [Diagram Editor] and take the tick off for [Hide title bar of the Diagram Editor (Restarting Astah is required)] and restart Astah.
If you are on Mac, changing the look and feel may work.
Go to [View] – [Look & Feel] and choose one except [Mac OS X].
In some environments, having this option on will make rendering slower.
When the value of INITIAL_HEAP_SIZE is set to 16m, the garbage collection does not work fully unless your computer uses more memory than 16MB.
To tune up, please change the -Xmx size by following the instructions here:
If you are on Windows
Open astah-pro.l4j.ini file which is located in Astah Installation folder with text editor and change the heap size
If you are on Mac
1. Go to Application folder and right-click on “astah professional.app” and select [Show Package Contents]
2. Open [Info.plist] file you can find under [Contents] package
3. In this file, will find the following lines. Change the -Xmx value.
If you are on Linux
Open /usr/lib/astah_professional/astah-pro file with a text editor and modify the JAVA_OPTS=”-Xms16m -Xmx384m” line.
Download the latest version from Download page.
Please follow the instructions here.
Please follow the instructions here.
Disabling the Content Assist (A dotted green line that appears on the diagram when you try to move and align objects with others) and Suggest Feature could increase the performance a little. To close, go to [Tools] – [System Properties] – [Diagram Editor] and take the tick off two options.
Yes. Please create Object diagrams using the Class diagram.
Please use [Instance Specifications] and [Link] are on the Tool Bar of Class Diagrams.
There are three ways to hide the mini icons.
1. Hold [Shift key] down
Suggest icons never appear while [Shift] key is pressed down.
2. Hide from the current diagram
Click [Suggest Feature] icon on the diagram tool bar to turn it off.
3. Hide from all by default
Go to [Tools] – [System Properties] – [Diagram Editor] and turn off the [Enable Suggest Feature].
Astah project files (.asta) are upward compatible. If project files have been edited by newer version, they cannot be opened in older version of Astah. For information about model versions, click here.
If you cannot open project files using appropriate version of Astah, please change the stack size in the [Tools] – [System Properties] – [File].
In that case, Clone the model instead of copying. A cloned model will be an independent model.
If you have a preferred Java to use Astah, you can use it by following the instruction below. However technical support is not provided if you are using Astah on un-supported System Requirements.
When you use un-supported Java to run Astah, you will get the alert when launching Astah. To ignore this alert,, add-nojvchk option at launch.
Please refer to “How to run Astah on Linux“.
When you are asked to send log files along with your bug report, please send the 2 log files that are stored in your home directory:
You can find them in the USER_HOME\.astah\professional directory.
Additionally, if your bug may be related to the plug-ins, please send us the log file accordingly which you can also find in the USER_HOME\.astah\professional directory.