Article ID: 9608, created on Jan 26, 2011, last review on May 19, 2015

  • Applies to:
  • Virtuozzo 6.0
  • Virtual Automation 6.0


The issue usually occurs after upgrading Parallels Virtual Automation (PVA) Agent. When trying to access the PPP of a virtual machine (VM), right after logging in, the following error message is shown:

Application Error
The server has encountered an internal error or misconfiguration.
Contact your support representative.

Additionally, in /var/log/pva/pp/<DATE>-cpcon.log, these messages may appear on every access attempt:

18/01/2011 09:55:23.0452650 () : XSLT: runtime error: file /var/opt/pva/pp/xsl/lib/vt/core.xsl line 158 element die
18/01/2011 09:55:23.0453050 () : XSLT: sw:die : XSL transformation stops
18/01/2011 09:55:23.0453270 () : void xslElemDie(xsltTransformContext*, xmlNode*, xmlNode*, xsltElemPreComp*) at xslext/xslutils.cpp:228 : template name='show-os-apps'  (param at /var/opt/pva/pp/xsl/lib/vz/vzenv-apps.xsl:35)
template name='body' match='body'  (variable at /var/opt/pva/pp/xsl/screens/index.xsl:50)
template match='/'  (choose at /var/opt/pva/pp/xsl/screens/index.xsl:36)
18/01/2011 09:55:23.0453490 () : void xslElemDie(xsltTransformContext*, xmlNode*, xmlNode*, xsltElemPreComp*) at xslext/xslutils.cpp:231 : sw:die : message:

                                       Platform '' is unknown.

18/01/2011 09:55:23.0458890 () : VZAXML* TransformationManager::apply_stylesheet(boost::intrusive_ptr<VZCPDocumentPrototypeT<xslDocumentTraits> >, VZL::VZLMessage*) at TransformationManager.cpp:877 : XSLT processor error state 2.
18/01/2011 09:55:23.0459400 () : int WebCP::httpScreen(std::basic_string<char, std::char_traits<char>, std::allocator<char> >, VZL::VZLMessage*) at WebCP.cpp:1013 : Can't process output XSL transformation for screens/index.xsl


Guest Operating System is set incorrectly in the VM configuration or has a value of Other.


Go to the VM screen in PVA and set the proper Guest Operating System value under General Settings.

Search Words

Application Error

Platform '' is unknown

power panel not working

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