Unable to export assembly from IPE to Civil 3D

[diaa_maa]

When I'm trying to export a custom assembly from IPE to Civil 3D I'm getting this message.

[paulo_santoso]

Usually this is because a required parameter is missing or the Inventor template file cannot be found.

I found this same issue here.

To Publish custom assembly from Infrastructure Parts Editor to Civil 3D, follow the below steps:

1. Make sure the Inventor templates are saved in a local location with editing rights to it. Move the templates if necessary.
2. Delete the template from Infrastructure Parts Editor by following the steps in this article: How to remove Inventor templates from Infrastructure Parts Editor.
3. Add the template back, create an assembly, and publishing again.

This thread will help you further.