I want to add the value of ‘SystemType’ to the parameter ‘IfcSingleMaterialOverride’. It works perfectly if I use ‘SystemClassification’ but not with SystemType because the output of SystemType is ElementType and not the exact value from Revit.
Hi @Luis.DeBie and welcome 
try with an element.name node before feed in the parameter
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Still getting some warnings but it worked! Thank you @sovitek
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not all component have system type only pipes and ducts, fittings, accesories etc…so try filter them out and only write to them, or replace your null with something…depends
