Model cannot upgraded to 2020 version from 2017 version

[pe_simon]

I have received a 2017 version model and tried to upgrade it to 2020 version but failed. After loaded 100% with not responding... What can I do?? Thanks.

P.S. The model size is 143mb.

The file uploaded to :  https://www.sendspace.com/file/euze7e

[MichaelDol · Accepted solution]

opened with a check for about an hour, here's the file.

[pe_simon]

Thanks!