SX files to Artist 8 - Image construction error

Hi All, I just got a ne w 64 bit pc, win 7 prof. And cubase artist 8. When trying to load my old SX projects, the waveforms have ‘image construction error’ on them, plug ins load but don’t work against these waveforms.
All is fine when loading new files. It seems to be the SX files. Reconstruct is also greyed out in the pool menu.
Can anyone help me?