Hi,

i've tried to upgrade from VM Invoice 1.1.2 to 1.7.0 and Joomla posts following error messages:

Invalid upgrade operation: plugins
Invalid upgrade operation: plugins
File does not exist in upgrade package: /admin/views/invoice/tmpl/default_detail.php
File does not exist in upgrade package: /admin/views/invoice/index.html
File does not exist in upgrade package: /admin/views/invoice/view.html.php
File does not exist in upgrade package: /admin/views/invoice/tmpl/index.html
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusans.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusans.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusansb.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusansb.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusansbi.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusansbi.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusanscondensed.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusanscondensed.php
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusanscondensed.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusanscondensedb.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusanscondensedb.php
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusanscondensedb.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusanscondensedbi.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusanscondensedbi.php
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusanscondensedbi.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusanscondensedi.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusanscondensedi.php
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusanscondensedi.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusansi.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusansi.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusansmono.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusansmono.php
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusansmono.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusansmonob.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusansmonob.php
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusansmonob.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusansmonobi.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusansmonobi.php
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusansmonobi.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusansmonoi.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusansmonoi.php
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavusansmonoi.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavuserif.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavuserif.php
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavuserif.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavuserifb.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavuserifb.php
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavuserifb.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavuserifbi.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavuserifbi.php
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavuserifbi.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavuserifcondensed.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavuserifcondensed.php
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavuserifcondensed.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavuserifcondensedb.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavuserifcondensedb.php
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavuserifcondensedb.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavuserifcondensedbi.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavuserifcondensedbi.php
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavuserifcondensedbi.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavuserifcondensedi.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavuserifcondensedi.php
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavuserifcondensedi.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavuserifi.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavuserifi.php
File does not exist in upgrade package: /admin/tcpdf/fonts/dejavuserifi.z
File does not exist in upgrade package: /admin/tcpdf/fonts/freemono.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/freemono.php
File does not exist in upgrade package: /admin/tcpdf/fonts/freemono.z
File does not exist in upgrade package: /admin/tcpdf/fonts/freemonob.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/freemonob.php
File does not exist in upgrade package: /admin/tcpdf/fonts/freemonob.z
File does not exist in upgrade package: /admin/tcpdf/fonts/freemonobi.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/freemonobi.php
File does not exist in upgrade package: /admin/tcpdf/fonts/freemonobi.z
File does not exist in upgrade package: /admin/tcpdf/fonts/freemonoi.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/freemonoi.php
File does not exist in upgrade package: /admin/tcpdf/fonts/freemonoi.z
File does not exist in upgrade package: /admin/tcpdf/fonts/freeserif.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/freeserif.php
File does not exist in upgrade package: /admin/tcpdf/fonts/freeserif.z
File does not exist in upgrade package: /admin/tcpdf/fonts/freeserifb.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/freeserifb.php
File does not exist in upgrade package: /admin/tcpdf/fonts/freeserifb.z
File does not exist in upgrade package: /admin/tcpdf/fonts/freeserifbi.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/freeserifbi.php
File does not exist in upgrade package: /admin/tcpdf/fonts/freeserifbi.z
File does not exist in upgrade package: /admin/tcpdf/fonts/freeserifi.ctg.z
File does not exist in upgrade package: /admin/tcpdf/fonts/freeserifi.php
File does not exist in upgrade package: /admin/tcpdf/fonts/freeserifi.z

Errors detected when upgrading JoomSEF. Please check the errors reported above and repeat the upgrade process.

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JoomSEF ??? I would like to upgrade VM Invoice ;-)

Best regards.