The OrcaFlex Blog

We have just released a minor upgrade to OrcaFlex, version 9.1c. We strongly recommend that all users of 9.1 upgrade to 9.1c.

Version 9.1c fixes two bugs as described below:

Vessels

Versions of 9.1a and 9.1b had a bug which affected vessel motions and runtime performance when all of the following conditions were met:

• The implicit integration scheme was in use.
• A vessel had Primary Motion set to “Prescribed” or “Time History”.
• That same vessel had Superimposed Motion of “None”.

When all these conditions were met then vessel motions contained errors. The errors build up gradually during the simulation which means that longer simulations are more seriously affected. In addition simulations were significantly slower than they should have been.

In version 9.1c the problem has been corrected.

Lines

Versions 9.1a and 9.1b had a bug related to the new hint window results feature introduced in version 9.1a. If a replay is paused and you hover the mouse pointer over a line then a hint window is displayed. This hint window now includes results. The code to derive these results contained a bug which corrupts Summary and Full Results for the line, and also corrupts the 3D View of the latest simulation position.

Note that the bug does not affect other results such as Time History, Statistics, Range Graph etc. It also does not affect replays. The bug is corrected in version 9.1c.

Obtaining the upgrade

A patch to upgrade from any earlier version of 9.1 to 9.1c is available for download from our website. When downloading the patch you will be asked for a username and password which you can find in the OrcaFlex 9.1 About box (see About on the Help menu).

If you would prefer to receive version 9.1c on CD please contact us.

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