Hi,
When using the user defined for PTO block (z direction for us) we got the following error:
(ahcontrol4 is our .slx file)

Caused by:
Error using wecSim (line 130)
Error in port widths or dimensions. Output port 1 of 'ahcontrol4/Global Reference Frame/Solver Configuration/EVAL_KEY/INPUT_DEMUX_3_0' is a one dimensional vector with 6
elements.
Error using wecSim (line 130)
Error in port widths or dimensions. Input port 1 of 'ahcontrol4/Global Reference Frame/Solver Configuration/EVAL_KEY/INPUT_3_1_1' is a one dimensional vector with 1
elements.