Problems with missing extents ...

Good news !
Last weekend I found a new approach to handle missing  / lost extents of a VMFS-datastore.
Unfortunately I was not able to fix the headers of the lost extent so that I was not able to re-add the missing extent.
But I was able to successfully extract all vmdks - some of them used Veracrypt encryption and had up to 25000 fragments.
Even the encrypted VMDKs survived.
This approach is quite challenging and time-consuming as all files have to be extracted.
Advantage: this will also work if the VMFS-headers of the lost extent are partially corrupted.
So if you ever run into a similar issues - call me before you give up ....
Ulli