OrcaFlex 11.0

Release details

The latest release of OrcaFlex 11.0 is OrcaFlex 11.0e.

The new features introduced in OrcaFlex 11.0 can be viewed online in the OrcaFlex help file. The OrcaFlex 11.0 help file can also be downloaded:


To upgrade to OrcaFlex 11.0e from 11.0c or 11.0d, download the following ZIP file:


and execute the .msp patch file that it contains.

To upgrade to OrcaFlex 11.0e from 11.0a or 11.0b, download the following ZIP file:


and execute the .msp patch file that it contains.

To upgrade to OrcaFlex 11.0e from 10.3 or earlier, download the install program from your company’s Orcina software download page. A link to this page was sent to your software administration contact when we released 11.0a. If you do not have access to this page, please contact us.

A more in depth discussion of the major new features introduced in OrcaFlex 11.0 isĀ available in the news section.

Known bugs in version 11.0e


  • Vessel manoeuvring load has been changed to exclude a contribution that was previously double-counted. Part of the contribution to vessel inertia load from added mass was included in the simulation twice. The removal of this contribution from the manoeuvring load is done by the first term of the load component equations presented in the theory.
  • The WAMIT output file presenting multibody added mass and damping data for import was assumed to always refer to waves by period. This assumption could be false, and the imported data would then be associated with the wrong period or frequency. The import process will now attempt to determine whether the .1 file refers to waves by period or by angular frequency.

These bugs will be fixed in version 11.0f.

  • For models containing a line with a nonlinear stress-strain relationship and an additional bending stiffness, if the solution method had changed from frequency domain to time domain, then running statics would fail with an invalid floating point operation error.
  • OrcaFlex would fail to solve statics, presenting a floating point exception on the statics progress window, when line contact was applied to a stiffener attachment line without torsion included.
  • Turbine models using the specified torque generator control mode with free blade DOFs and very stiff segments at root, could fail to converge once the generator had undergone a large number of rotations. The solver has now been adapted to be more robust to such cases.

These bugs will be fixed in version 11.1a.


  • Models solving for full QTFs may have raised a floating point division by zero error message when performing validation. The error occurred if the free surface outer circle had a radius of zero and a nonzero number of segments.
  • In models solving for full QTFs, the inner radius of the free surface panelled zone was editable when no mesh file was supplied. This was incorrect because the inner radius is undefined if there is no panelled zone mesh file.

These bugs will be fixed in version 11.0f.