Can't open build packages cache

[tommi.kuenneth]

Hello.

When trying to run autoinstaller I get an error that says "Can't open build packages cache"

root:/usr/local/psa # /usr/local/psa/admin/sbin/autoinstaller --debug --select-release-id PLESK_8_1_0 --install-everything
Checking for installed system packages...done.
Download file products.inf3: 100% done.
Download file plesk.inf3: 31%..100% done.
Download file sitebuilder.inf3: 11%..83%..100% done.
Download file PSA_8.1.0/plesk-8.1.0-suse9.3-i386.inf3: 100% done.
Check for components installation status
You are under Virtuozzo, try to connect to VZAgent...Warning: can't connect to VZAgent: open: No such file or directory
Reading system installed packages...done.
Download file build-8.1.0-suse9.3-i386.hdr.gz: 13%..26%..37%..50%..62%..74%..87%..98%..100% done.
Download file update-8.1.0-suse9.3-i386.hdr.gz: 36%..78%..100% done.
ERROR: Can't open build packages cache

How can I fix that cache (rebuild, clear, ...)?

Thank you very much in advance.

Regards
Thomas