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  1. Anonymous User
  2. RO CSVI
  3. Monday, 25 August 2025
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I'm trying to migrate my Virtuemart in Joomla to 3 to Virtuemart in Joomla 5

I'm getting unexpected behaviour on each site.

In Joomla 5, after trying to "update the list" it does most updates, but then comes back with

Duplicate entry 'VAT-order-com_virtuemart-export' for key 'component_name_table'
The list of available fields is out-of-date for extension com_categories. Update the list to ensure you have all fields available.


I'm not sure if this will prevent me from migrating, but it's something to note.

In Joomla 3, there were 3 issues I experienced so far. The initial one was that I get the following error after installing the plugin:
An error has occurred.

0 Class "Joomla\Database\DatabaseDriver" not found


The plugin seems to install for the most part, but I assume that there are some things that might not finish.

And then in Joomla 3, I'm also not able to install the example templates. And it doesn't show the list of available example templates. Perhaps this is due to the botched incomplete install, or maybe it's a separate issue. I thought about restoring the templates, through the restore template button, but that's also broken in Joomla 3.

I sure I could manually copy over all the templates, if nothing else works, but I thought I'd ask for some advice.


Thanks so much!
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Accepted Answer Pending Moderation
Hello,
Duplicate entry 'VAT-order-com_virtuemart-export' for key 'component_name_table'
The list of available fields is out-of-date for extension com_categories. Update the list to ensure you have all fields available.

In VirtueMart Taxes and Calculation rules page you must be having duplicate rules with name VAT and that is causing this error. Change the names and run the update of available fields. Error should be gone after that.

0 Class "Joomla\Database\DatabaseDriver" not found

This is a known error and has been already fixed. Please download the new package from https://transfer.rolandd.com/17e98955b37d and the install should be good to go. This fix will be included with upcoming RO CSVI release.

Install the new package and then check the installation of example templates. Let me know on how that goes.
Kind regards,

Tharuna

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  1. 6 hours ago
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