Bug - STEP Export Exception

[leoheck]

I am exporting STEP files, with assemblies. I got this (red) error now.
I am using some FCStds and STEPS. All of them imported with A2Plus.

I don't even understand what this message means. Maybe it is useful here.

Code: Select all

C++ exception thrown (vector::_M_range_check: __n (which is 18446744073709551614) >= this->size() (which is 6))

OS: Ubuntu 20.04 LTS (ubuntu:GNOME/ubuntu)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.21125 (Git) AppImage
Build type: Release
Branch: master
Hash: 40600a55c2fe71ff589be677f6e427ccc937d003
Python version: 3.8.2
Qt version: 5.12.5
Coin version: 4.0.0
OCC version: 7.4.0
Locale: English/United States (en_US)