Boolean union of closed Breps in Grasshopper

[Michael_Loibl]

Hi,
I have a list (tree with 40 branches) of Closed Breps and I want to merge them to one volume object. I would do this in Rhino with BooleanUnion. However, the respective SolidUnion is not working for me in Grasshopper. If I bake my Breps and perform the operation in Rhino it works though. Any ideas how I could merge multiple volumes into one in Grasshopper?
Best regards,
Michael Loibl

[Joseph_Oster]

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Flatten the SUnion input?