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Integrated BIM tools, including Revit, AutoCAD, and Civil 3D
& Manufacturing

Professional CAD/CAM tools built on Inventor and AutoCAD
Integrated BIM tools, including Revit, AutoCAD, and Civil 3D
Professional CAD/CAM tools built on Inventor and AutoCAD
Autodesk Support
Feb 19, 2025
Products and versions covered
When trying to insert a flange onto a pipe in AutoCAD Plant 3D, an error message pops up and the inserted flange stays unconnected, and no second flange is inserted automatically. The following prompts may be displayed:
AutoFlange connection failed due to the properties mismatch.
One or more items have caused an error.
Cannot connect parts.
AutoFlange connection failed due to the properties mismatch.
E1.Facing= '<specific end code>"
AutoFlange-Compound joint AutoFlange cannot connect with two simple joints.
Cannot find Gasket in the <spec name> spec.
One or more items have caused an error.
Cannot connect parts.
Cannot resolve Flanged connection.
Cannot find Gasket in the <spec name> spec.
NominalDiameter='2in' AND Facing='RF' AND PressureClass='300'
No connection defined for end types FL and SO in the config file.
AutoFlange-Compound joint AutoFlange cannot connect with two simple joints."
AutoFlange-Compound joint AutoFlange cannot connect with two simple joints.
One or more items have caused an error.
Cannot connect parts.
Flanged
NominalDiameter=E1.NominalDiameter AND IsLugSet=0 AND ((Facing=E1. Facing OR Facing=E2.Facing) AND PressureClass=E1.PressureClass, pos = 63, err = eQryErSynUnbalPar
NominalDiameter=E1.NominalDiameter AND IsLugSet=0 AND ((Facing=E1. Facing OR Facing=E2.Facing) AND PressureClass=E1.PressureClass, pos = 48, err = eQryErSynUnbalPar
AutoFlange-Compound joint AutoFlange cannot connect with two simple joints."
MixedAutoFlange-Compound joint MixedAutoFlange can not connect with two simple joints.
One or more items have caused an error.
Error message: Cannot connect parts.
No connection defined for end types FL and SO in the config file.
MixedAutoFlange-Compound joint MixedAutoFlange cannot connect with two simple joints.
Follow any of the below solution steps:
Remove the mandatory property in the compound joint.
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