Error running topology optimisation

Hi,

 

I've set up my topology optimisation to minimise the volume fraction and believe everything is set up correctly.

 

However when I try to run it I get the following error message:

 

'Unknown beamsection data type 'part_InitLengtangeLength' found in file.'

 

Does anyone know why I might be seeing this and how I might resolve it?

 

Thanks,

 

Luke

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