File Export to MS Project

TEST N°1
1 – Project – Export
2 – File Format : MSPDI
3 – File generated
4 – MS Project – File Open

Not abble to open MS Project do not recognize this file format. Open as a read only Yes NO
Mapping Assistant

Message : you re trying to open an old file format

TEST N°2
1 – Project – Export
2 – Export File Format MPX
3 –MS Project File Open
4 - Microsoft Project
Not abble to open MS Project do not recognize this file format. Open as a read only Yes NO
Mapping Assistant
Microsoft Message : “you re trying to open an old file format”
I change the format to unicode with the same result.
Version : Gantt Project 3.0.3004 , Project 2019
Would you have a tutorial or any kind of recommandation to fixe this ?
Regards
Stephane

MSPDI is known as Microsoft XML format. It is supported by MS Project.