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Could not load file or assembly System.IO.Ports, Version=0.0.0.0

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Posted on by Mohana Yadav

60,993 Super User 2025 Season 2

Hello All,

we got a custom dll from another partner and facing the below error while using it. Not able to understand Version 0.0.0.0 part. how can we solve this? Any help is highly appreciated.

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Dynamics 365 Business Central

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Gerardo Rentería Ga... 25,157 Most Valuable Professional on at

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Hi

I hope this can help you and give you some hints.

Some Known Issues in Business Central On-premises - Business Central | Microsoft Learn

Best regards

Gerardo

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Judy Microsoft Employee on at

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Please check if you have installed some third-party extensions that may cause such issue.

The error is mentioned in the following link; https://stackoverflow.com/questions/51944480/could-not-load-file-or-assembly-system-io-version-4-0-0-0-culture-neutral-pu

If the issue persists, you may need to collect additional information such as event log messages or perform further troubleshooting steps.

https://learn.microsoft.com/en-us/dynamics365/business-central/dev-itpro/developer/devenv-troubleshooting-overview

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