Can't use Bootcamp partition after update to high sierra

I used Parallels to boot my Windows7 Bootcamp partition last years. A couple weeks ago I updated my Mac to High Sierra and now I'm no longer able to use the Bootcamp partition. I always get the message: "The specified file cannot be used as a virtual hard disk" My Mac has one hard disk, one partition is used by Bootcamp. I haven't found useful threads at the internet about my problem.

 

Hello @GerdM1 , please let us know the version of Parallels Desktop you are using.
Thanks

 

The version is 13.2.0

 

Please follow the steps provided at http://kb.parallels.com/124294 and check if it works.
Thanks

 

I already have Parallels 13.2.0 43213.
I tried csrutil disable etc. and it works

 

Glad to know it works.
Thanks