---
title: "Fixing Matrix (Legacy Economic Questionnaire) Setting After Upgrade (UseLegacyEconomicQuestionnaireBitMask)"
slug: "fixing-legacy-rcm-economic-questionnaire-setting-after-upgrade"
updated: 2026-10-27T23:12:43Z
published: 2026-10-27T23:12:43Z
canonical: "ims-handbook.cenosco.com/fixing-legacy-rcm-economic-questionnaire-setting-after-upgrade"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://ims-handbook.cenosco.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Fixing Matrix (Legacy Economic Questionnaire) Setting After Upgrade (UseLegacyEconomicQuestionnaireBitMask)

After upgrading an IMS RCM environment from an older version to the .NET versions 4.+ , some sites may experience calculation inconsistencies, including:

- Asset factor being **10× higher**
- Incorrect DET matrix values
- Incorrect economic questionnaire behaviour
- Incorrect criticality and scheduling results

This happens because older IMS versions stored the setting `UseLegacyEconomicQuestionnaireBitMask` in `web.config`, but .NET-based versions no longer read that file.

To restore correct behavior, this legacy setting must be added to the **Release environment JSON configuration file**.

Find the correct webserver. open IIS (Internet Information Service) Manager

Right click the data service and press explore.

![](https://cdn.document360.io/e492a0e0-a4ba-4aca-8fc6-76b95f91fdf3/Images/Documentation/image-FWMJFU43.png?sv=2026-02-06&spr=https&st=2026-10-28T14%3A41%3A47Z&se=2026-10-28T15%3A41%3A47Z&sr=c&sp=r&sig=v7ONInZmWf16aHF7GiA2GmKq0Az8DU1LYWBr%2FGa41zw%3D)

The explorer will open and find the folder with the “appsettings.Release.Json” (should be in the dataservice file).

Right click and Edit with Notepad++

![](https://cdn.document360.io/e492a0e0-a4ba-4aca-8fc6-76b95f91fdf3/Images/Documentation/image-NOT72TJW.png?sv=2026-02-06&spr=https&st=2026-10-28T14%3A41%3A47Z&se=2026-10-28T15%3A41%3A47Z&sr=c&sp=r&sig=v7ONInZmWf16aHF7GiA2GmKq0Az8DU1LYWBr%2FGa41zw%3D)

Check if the Appsettings.Release.json already has the “UseLegacyEconomicQuestionnaireBitMask”: “2”, If not you can add it on top:

RCM only would be “UseLegacyEconomicQuestionnaireBitMask”: “2”

PEI only would be “UseLegacyEconomicQuestionnaireBitMask”: “1”

PEI and RCM would be “UseLegacyEconomicQuestionnaireBitMask”: “3”

![](https://cdn.document360.io/e492a0e0-a4ba-4aca-8fc6-76b95f91fdf3/Images/Documentation/image-0QN9UU1X.png?sv=2026-02-06&spr=https&st=2026-10-28T14%3A41%3A47Z&se=2026-10-28T15%3A41%3A47Z&sr=c&sp=r&sig=v7ONInZmWf16aHF7GiA2GmKq0Az8DU1LYWBr%2FGa41zw%3D)

Restarting Data service:

After that restart the Data service and check the Matrix for correct values. This can be done by going back to IIS Manager, right clicking the data service → Manage Website → Restart ![](https://cdn.document360.io/e492a0e0-a4ba-4aca-8fc6-76b95f91fdf3/Images/Documentation/image-NCHTU1HC.png?sv=2026-02-06&spr=https&st=2026-10-28T14%3A41%3A47Z&se=2026-10-28T15%3A41%3A47Z&sr=c&sp=r&sig=v7ONInZmWf16aHF7GiA2GmKq0Az8DU1LYWBr%2FGa41zw%3D)