Strange WBS when importing a MS Project schedule

Hello fellow planners,

I recently tried to import a 400 activity schedule from MS Project 2003 into Primavera PM6, via either a MPP or XML file.

Almost everything went right, except the WBS which looks really strange: only the project level and the 1st level below are correct; starting with the 2nd level, the code is duplicated, for instance:

MyProject

• MyProject 1
  • MyProject 1.1.1
    • MyProject 1.1.1.1.1

instead of

• MyProject 1
  • MyProject 1.1
    • MyProject 1.1.1

Any idea of the reason why such a strange behaviour, any possible work-around will be highly appreciated and warmly welcome!

Best Regards from sunny Marseille, France