Failed to regenerate table /etc/postfix/virtual

installing VM gpl and having a problem

root@openstream:~# dpkg --configure -a
Setting up virtualmin-base (1.0-19) ...
Setting Webmin theme
Setting Usermin theme
Configuring Postfix
Error: Failed to regenerate table /etc/postfix/virtual:
Error
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Failed to regenerate table /etc/postfix/virtual:
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Call Stack Trace
In file /usr/share/webmin/postfix/postfix-lib.pl at line 685 calling postfix::error
In file /usr/share/webmin/postfix/postfix-lib.pl at line 624 calling postfix::regenerate_any_table
In file /var/lib/dpkg/info/virtualmin-base.postinst at line 95 calling postfix::regenerate_virtual_table
In file /var/lib/dpkg/info/virtualmin-base.postinst at line 136 calling (eval)
dpkg: error processing virtualmin-base (--configure):
subprocess post-installation script returned error exit status 1
Errors were encountered while processing:
virtualmin-base

and idea what to do ? postmap does work on /etc/postfix/virtual

Status: 
Closed (fixed)