Error using webcut with a sheet body


I’m trying to webcut a volume with a sheet body (see png in attached file) but I get the following error:

Performing webcut operation…
Error in webcutting volume with sheet.
ACIS API error number 98033
ACIS API message = inconsistent face-body relationships
No volumes were webcut.

The sheet body is made of several united surfaces and the box is created using the brick command.

My .jou file is in attached file if that helps.

Thanks in advance for your help
make_geom.jou (2.82 KB)
Capture du 2019-07-31 17-37-45.png