Cannot Convert MEP Generic Elements to Fabrication Parts

Learn how to solve the most common issues when you use the Design to Fabrication command to convert MEP generic elements to fabrication parts.

If generic elements do not convert to fabrication parts, or if converted parts are the wrong size, review the following issues and try the associated solutions.

If the information below does not provide the help you need, visit the Revit user forum for assistance.

Issue 1

Error: Not all parts were converted. Check the fabrication service definition.

Solutions:

• Verify that you have specified the correct service and size for generic elements you want to convert.
• Ensure that the specified parts have not been excluded from the service.
• Ensure that the specified service contains the correct sizes. See Specify a Fabrication Configuration and Load Services in Revit.

Issue 2

The selection includes a service that does not support sloped piping.

Solutions:

• Specify a service that supports sloped piping. Before converting, check the layout to make sure the slopes are as specified by pipe slopes in the Mechanical Settings dialog. You should use a service that is designed to support slope pipes. These services typically support 1/16, 1/8, and 1/4 slopes. When you use the Design to Fabrication command, fittings from these services will be internally adjusted so the connectors will be properly aligned to any connected fabrication part. If the selected service doesn't support sloped piping, the fitting may fail to be placed.
• See Best Practices: Fabrication Detailing in Revit MEP.

Issue 3

One or more fittings in the selection has an open connector or the network is not well connected.

Solution:

• Use Disconnect Markers to verify that there are no open connectors on fittings and that the network is well connected. See Check Pipe Systems.

Issue 4

The selection includes one or more analytical connections.

Solution:

• Use filters to identify analytical connections in the model and delete them.