Frequently Asked Questions (FAQs)

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Why the Weasis license is Eclipse Public License?

The Eclipse Public License is an OSI approved license and a commercially friendly copyleft license.

EPL is more business-friendly about some patent retaliation and reverse engineering clauses than LGPL. With EPL, derivative work (weasis plugin) can be distributed in any license type: open source, freeware, commercial... However, if you distribute Weasis with some modifications (changing existing source code of the open source Weasis plug-ins), even if it is a free distribution, you are obligated to make your modifications available to others.

For more information about EPL, check out the EPL FAQ or the video “Managing Open Source Legal Issues”.

How to start Weasis automatically in Safari or in Google Chrome?

With recent Firefox and Internet Explorer versions, Weasis should launch automatically when clicking on an JavaTM Web Start file (*.jnlp).

In Google Chrome (for all the systems) to always open certain types of files after they're done downloading, click the arrow next to the file button in the downloads bar and select Always open files of this type.

In Safari, select the Safari/Preferences menu item, then select the General preferences and after check the open safe files after downloading option.

Can Weasis be incorporated in DICOM CDs ?

Yes, the Weasis portable version can be copied in DICOM CD-ROMs or other removable media as a multi-platform stand-alone viewer with launchers for MacOSX, Linux and Windows. The viewer requires that a Java Runtime Environment (JRE 6 update 10 or greater) be installed on the machine to run. If Java is not installed on Windows, a dialog will propose to install it from the Internet.

The viewer loads automatically images from DICOMDIR or from directories configured in "weasis/conf/ (,DICOM,IMAGES,images).

To burn Weasis with dcm4chee see Write weasis-portable to DICOM CDs with dcm4chee-cdw.

Osirix allows to burn Weasis in CD-ROMs and the Osirix DiscPublishing plugin allows you to use a Primera DiscPublisher robot.

How to enable Weasis logging?

Logs are available either in the Java console or in Weasis log files.

  1. By displaying the Java console:
    1. Windows
    2. Linux
    3. Mac:
      • Navigate to the following folder: Applications > Utilities > Java.
      • Click the Java Preferences icon and then the Advanced tab.
      • Under the Java console section, select the Show console radio button.
  2. By writing to log files:
  • From Weasis 1.1.2, logging can be activated from File > Preferences > General
  • The default logging configuration comes from or (overriding) located in the /weasis/conf directory of weasis portable or in the conf directory of weasis.war. Adapt the following lines:
    # This may be any of the defined logging levels DEBUG, INFO, WARN, ERROR and FATAL.${felix.cache.rootdir}/.weasis/log/default.log
    # {0} The timestamp of type java.util.Date, {1} the log marker, {2} the name of the current thread, {3} the name of the logger, {4} the debug level and {5} the actual debug message.{0,date,dd.MM.yyyy HH:mm:ss.SSS} *{4}* [{2}] {3} {5}

Is it possible to download DICOM files without having a WADO server?

Yes, but a WADO server is recommended. Downloading DICOMs can be achieved by:

  • Bulding an xml file by using DirectDownloadFile and DirectDownloadThumbnail:
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