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Using dotConnect for MySQL,version 5.50.57.0, in VS 2010, I keep getting [License not found. Please view "Licensing" topic in dotConnect for MySQL documentation for details or contact Devart technical support. ] error message.

I have read through DevArt's support pages and tried what they have said. I must be missing something, since I cannot get the 'Build Runtime Licenses' to show up.

Please help me.

dotConnect for MySql builds the license when Visual Studio builds the project. However, Visual Studio 2010 is not supported in dotConnect for MySql 5.50.57.0. Visual Studio 2010 is supported starting from dotConnect for MySQL 5.70.124, and Visual Studio 2010 Service Pack 1 is supported starting from dotConnect for Oracle 6.10.126. For more information, please refer to http://www.devart.com/dotconnect/mysql/ ... story.html

We advise you to upgrade dotConnect for MySQL to the latest version in order to use Visual Studio 2010, or use Visual Studio 2008 or earlier which is supported by dotConnect for MySql 5.50.57.0.

Thank you for the reply.

It is unfortunate that we need to upgrade when we have numerous applications using this version of the driver. We were hoping to continue to use it since we still need to support these legacy application and having two version of the DevArt Connector on a development system has caused us issues in the past. From our experience, we were not able to do this in the past.

We have continually encountered licensing issues for every application that utilize the DevArt Connector. We write web application, web services, and win forms application. The new version of the Connector probably has reduced the issues with licensing, but at this point in time, we don't know that empirically.

Our Development Team has been discussing what drivers and controls to use for our next generation applications, which will be cloud, web, win forms, and WPF based. The licensing issues and the need to continually purchase driver upgrades will make this decision easy.

When you upgrade dotConnect for MySQL from version 5.50.57.0 to the latest version which is 7.6.226, you should perform the following actions:
1. Uninstall dotConnect for MySQL 5.50.57.0;
2. Remove all Devart.* and policy.*.Devart.* files from the GAC;
3. Clear the Program Files\Devart\dotConnect and Program Files\Common Files\Devart\dotConnect folders;
4. Install dotConnect for MySQL 7.6.226;
5. Remove the licenses.licx file from your project;
6. Add the license resource to your project using License Wizard that helps you configure license information. To invoke the wizard choose MySQL | License Information from the Visual Studio Tools menu. Then click the Fix button in the dialog and follow the wizard's instructions.
7. Delete all files from the bin and obj folders and rebuild the project.

After this there should be no license issues. You can try using dotConnect for MySQL trial version to make sure that license issues do not occur. You can download the trial version of dotConnect for MySQL from our website http://www.devart.com/dotconnect/mysql/download.html. If you have ever installed dotConnect for MySQL trial version on your computer before, you will not be able to use the trial, in this case turn to our support team via the form.

Besides, you don't have to purchase upgrades for dotConnect for MySQL continually. As of dotConnect for MySQL 5.50.57.0 release there was no Visual Studio 2010 and some other technologies, that were supported in subsequent versions of dotConnect for MySQL.

You can upgrade your subscription. The subscription is valid for 1 year only after the purchase (or renewing). While the subscription is valid, you can download new versions of dotConnect for MySQL for free. When this period ends, you should renew your subscription to get access to Registered Users' Area again to download the latest versions. But the license itself is permanent in the sense that a particular version can be used without any time limitations.