It is likely that this has been fixed in QuickOPC 2016.2 build 524.1 which is now the current downloadable from this site.

The Opc.Ua.Configuration assembly was missing from the Embedded Assemblies install component (which is installed with the Full install but not with the Express installs).

An uninstall + install is needed to resolve it.

Best regards

Hello.

In the meantime, another customer has reported very similar issue (practically same error message, but from Visual Basic 6.0). And, after some experiments, he was also able to figure out what makes it happen.

In his case, he was getting the error when he chose Custom installation on the 2nd page of the Setup wizard, and then Full installation on the page with installation types/components.

Uninstalling the product, and installing it with one of the Express installs (on the 2nd page of the Wizard), has resolved the issue for him.

And, we were able to reproduce the issue (from VB 6.0) when we also used the Custom installation -> ... -> Full installation. We are investigating it but it will take some time.

Can you please also try the same workaround ?

Best regards

I will send those, but please be patient - I am busy with other tasks now.

There is an email that gets sent on each reply, but you do not receive them because your email server refuses them (it says: (reason: 550 5.7.1 Your email messages have been blocked by the recipient OR by Trend Micro Email Reputation Service. Contact the recipient or his/her administrator using alternate means to resolve the issue.))

Does the SVN contain installers, or does it require me to actually build the stuff from sources?

This is going to be tough. I have taken a VM with fresh installation of Windows 10 Enterprise 2015 LTSB (x64, English), installed Lazarus, and QuickOPC (2016.2, build 512.1), and the Free Pascal examples worked fine. I did the same with fresh Windows 7 Enterprise (x64, English), it also worked fine.

I was using Lazarus 1.6.0 and Lazarus 1.6.2 in Win64 version, both OK. Interestingly, when I used the Win32 version (on x64 machines), I got mysterious crashes, but different from yours - basically could not instantiate the EasyUAClient object. I think this is not related to your issue so let's ignore it for now.

Which version of Lazarus are you using?

Can you try some fresh machine?

Best regarda

That's weird. I cannot reproduce it. I have re-imported the type libraries, and ran the project, selecting example #13 (for ReadValue). It worked OK.

I am attaching my project, including the re-imported unit files. Could it be some kind of version/assembly/TLB mismatch on your computer?