Errors in SQL MDS since installing latest patch

Question

Errors in SQL MDS since installing latest patch

Andy Rawcliffe 0

Since installing last nights patch we are getting errors loading MDS - the patch has updated Newtonsoft DLL to 13.1.1 but we cannot find how to change this in any of the config files etc.

Could not load file or assembly 'Newtonsoft.Json, Version=13.0.1.25517, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter..ctor()

at System.Net.Http.Formatting.JsonMediaTypeFormatter..ctor()

at System.Net.Http.Formatting.MediaTypeFormatterCollection.CreateDefaultFormatters()

at System.Web.Http.HttpConfiguration.DefaultFormatters(HttpConfiguration config)

at System.Web.Http.HttpConfiguration..ctor(HttpRouteCollection routes)

at System.Web.Http.GlobalConfiguration.<CreateConfiguration>b__0()

Andy Rawcliffe 0 Reputation points

2025-09-11T14:57:57.26+00:00

Soprry has updated to 13.0.1 on MDS
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Andy Rawcliffe 0 Reputation points

2025-09-11T14:57:57.26+00:00

Soprry has updated to 13.0.1 on MDS
Deleted

This comment has been deleted due to a violation of our Code of Conduct. The comment was manually reported or identified through automated detection before action was taken. Please refer to our Code of Conduct for more information.

Answer 1

Steve CB 45

I had the same problem and had to update the web.config file for MDS (in C:\Program Files\Microsoft SQL Server\150\Master Data Services\WebApplication), changing the line just below <assemblyIdentity name="Newtonsoft.Json" culture="neutral" publicKeyToken="30ad4fe6b2a6aeed" />

from: <bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0" />

to: <bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="13.0.0.0" />

Tammy Cobb 0 Reputation points

2025-09-16T14:37:51.8966667+00:00

Thank you SO MUCH! I had no idea where to even begin to troubleshoot, and this fixed my issue.
Andy Rawcliffe 0 Reputation points

2025-09-16T14:57:43.17+00:00

Thanks for your help, one of the team managed to find and amend this
Narasimha G 45 Reputation points

2025-09-17T08:55:52.2066667+00:00

It saved my day. Thanks
Magnús Kristinsson 0 Reputation points

2025-09-22T15:23:58.4433333+00:00

Saved my day! Also had to reboot after this web.config update.
Ulf Tegnelov (DHL SE) 0 Reputation points

2025-09-25T10:42:43.2966667+00:00

Thanks , a lot of problems solved by this answer.
Jonas Olsson 0 Reputation points

2025-09-25T11:06:21.97+00:00

We encountered this issue after installing the September security patch for SQL Server 2019 in an MDS environment. Your information was very helpful and solved the problem.
06959350 0 Reputation points

2025-09-30T00:33:23.44+00:00

Every MDS instance in our enterprise was down after this security update. This resolved the issue and all sites are back online. Thank you!
Ronald Kraijesteijn 5 Reputation points

2025-10-21T14:21:11.9833333+00:00

Thanks this solved our issue

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Errors in SQL MDS since installing latest patch

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