NAV - MS Project Interop (DotNet)

Dear all,

We have quite a strange issue with DotNet Interop in Microsoft Dynamics NAV 2016 CU11.
No matter how we try to open this *.mpp file, we receive the error message: The argument value is invalid.
Does someone see the problem?

Thanks so much for any tip.

Best regards,
Sébastien

AppProject = Microsoft.Office.MSProject.Application
AppProjectClass = Microsoft.Office.MSProject.ApplicationClass

AppProject:=AppProjectClass.ApplicationClass();
AppProject.Visible:=TRUE;
pjMergeTypeBigInt := 0;
pjPoolOpenBigInt := 0;
TinyInt:=0;

AppProject.FileOpenEx(
  'E:\TEST.mpp', 
  TRUE,
  pjMergeTypeBigInt,
  FALSE,
  '',
  '',
  FALSE,
  '',
  '',
  'MSProject.mpp',
  '',
  pjPoolOpenBigInt,
  '',
  '',
  TinyInt,
  '',
  FALSE);

ERROR('APPLICATION OPEN');