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'Run time is over limit' with valid license

13 Dec 2023 11:47 #12476 by dvrstrae
You're right, the message was different. The downgrade worked. Thanks!
The following user(s) said Thank You: support

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08 Dec 2023 13:18 - 08 Dec 2023 13:19 #12460 by support

I do not know at this point why 2018.3 gives an error, but I can assure that you do not get the very same error message. It may start with the same text, but it will have different details at the end. if 2018.3 does not work, please provide the full error text again, now with 2018.3.

Best regards
Last edit: 08 Dec 2023 13:19 by support.

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08 Dec 2023 13:13 #12459 by dvrstrae
Thanks for the quick response.

However, even after downgrading to 2018.3, I still get the same message after 1/2h. I also removed and reinstalled the license. Do I need to do anything else?



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07 Dec 2023 16:50 #12458 by support

Your license was purchased on Dec 7, 2017, with 1 year upgrade assurance, which means that it covers QuickOPC versions released until 12/7/2018. According to the QuickOPC version table ( ), the latest version covered by your license key is thus QuickOPC 2018.3.

The software version you actually trying to use is QuickOPC 2023.2 (5.72), and that is why the license key does not work. if you want to use a version newer than 2018.3, you need to upgrade the license.

Best regards

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07 Dec 2023 16:42 #12457 by dvrstrae

We have a Professional license, and have developed already several applications with QuickOPC. In a current application however, when using QuickOPC in Python through the opclabs_quickopc library, we encounter the following exception after using the client for more than a half hour. We simply use EasyUAClient in a read / write mode (not PubSub).

The license is correctly installed and shows up in the License manager.

OpcLabs.BaseLib.Licensing.LicensingException: Run time is over the limit in license "Multipurpose", serial number 1111111120. The license you are running (most likely trial version) does not provide valid data after certain time period expires. Note that after the component's process is simply restarted, valid data will be provided again. Obtain and install proper license to permanently resolve this error. You can ask for evaluation license key, if you need a longer run time for your tests.
Product information follows. Component name: "QuickOPC", license IDs: "Multipurpose", version number: 572, release date: 21/11/2023, trial validity: 397 days, option expression: "EasyUAClient".
Context: 1 dropped license(s); S/N 1955322456 (release date covered 07/12/2018).

The script that shows the error:
server =  'opc.tcp://'
tag = 'nsu=;i=10853'
write_tag = "nsu=;i=10221"
client = EasyUAClient()
for i in range(1000):
    value = IEasyUAClientExtension.WriteValue(client,
    value = IEasyUAClientExtension.ReadValue(client,

Thanks for your advice!

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