Wavelab crashing with a simple sweep

Hi, I keep on having issues with the current Wavelab pro 9.

I open a simple sweep at 96Khz (20 48K) and Wavelab crashes after I start playing.

It doesn’t happen with standard songs/files.

Please How can I fix it?

Using WaveLab 9.0.35? 64 bit?
Any 96k file is causing this problem?

Yes 64bit and latest version.
I tried with other 96k files and everything seems to work as usual. I really don’t understand why if I run the sweep I incur into this crash. I enabled the crash reports but nothing gets saved after the crash in the crash folder.