Frequently Asked Questions   Sections

The Gentleware FAQ is a comprehensive list of questions regarding Poseidon for UML. At this time, third-party plug-ins and products are not covered in this FAQ but we plan to add them in the future. Further information is available from the Poseidon documentation or you can post to our forum.


Submitting a Question

Please feel free to submit questions regarding any Gentleware product, including the plug-ins and partner products, to


Viewing the FAQ

Select a topic from the list at right. The subtree for your selection will open below.

FAQ Section: Weird Bugs
  1. WARNING: Couldn't flush system prefs: [...] Couldn't get file lock.
  2. Poseidon crashes/ ends in a Blue Screen on Windows XP/2000

    Unfortunately, most Java applications will crash whenever they encounter particular combinations of graphics cards and drivers. This usually occurs with old graphics drivers.

    Download and install the latest driver from the manufacturer's web site, or contact the manufacturer or your local vendor.

    Other cures include:

    • Tuning of hardware acceleration (disabling DirectDraw and Direct3D)
    • Disabling Java's 2D-support by adding the parameter "-Dsun.java2d.noddraw=true" to the start-script of Poseidon (found in the bin directory)

  3. UmlDoc just hangs...
  4. I'm having some strange repaint problems...
  5. How can I fix the toolbar display in the Metal look and feel?
  6. Why does type ahead not work in quicksearch?
  7. Poseidon crashes when trying to change font on Ubuntu Linux

© 2000 - 2010 Gentleware AG
 support  faq  faq poseidon for uml