--- title: "Resolving \"Invalid TLV Error\" when Running Custom Reports." description: When running a Windows operating system, applications will share files, such as dlls. If an application modifies the file, the dll can be re-registered under a this other application which can break the link for Crystal Viewer. --- [Skip to content](https://hub.acctivate.com/articles/invalid-tlv-error-running-custom-report#main-content) [Go to Customer Portal](https://hub.acctivate.com/tickets?hsLang=en) ![Acctivate - A CAI Solution](https://hub.acctivate.com/hubfs/Images/Logos/acctivate-cai-logo-svg.svg) - [Knowledge Base](https://hub.acctivate.com/articles) Open main navigation Close main navigation - [Knowledge Base](https://hub.acctivate.com/articles) - [Go to Customer Portal](https://hub.acctivate.com/tickets) - [Support Resources / Create Ticket](https://acctivate.com/support) [Support Resources / Create Ticket](https://acctivate.com/support) Hello. How can we help you? - There are no suggestions because the search field is empty. 1. [Knowledge Base](https://hub.acctivate.com/articles?hsLang=en) 2. [Troubleshoot](https://hub.acctivate.com/articles/troubleshoot?hsLang=en) 3. [Reports](https://hub.acctivate.com/articles/troubleshoot?hsLang=en#reports) April 8, 2025 # Resolving "Invalid TLV Error" when Running Custom Reports. ## When running a Windows operating system, applications will share files, such as dlls. If an application modifies the file, the dll can be re-registered under a this other application which can break the link for Crystal Viewer. ### Invalid TLV Error Running Custom Report Sometimes users can receive the error below when running custom reports: > Invalid TLV record. \\\\SERVER\\ACCTivateData\\CustomReports\\Order.rpt > Application Module: Report, Subroutine: OpenReport, Source: Crystal Reports ActiveX Designer When running a Windows operating system, applications will share files, such as dlls. If an application modifies the file, the dll can be re-registered under a this other application which can break the link for Crystal Viewer. To resolve this specific issue, follow the instructions below: 1. On the server, right click on the **Acctivate** icon **\> Open File Location** 2. Open the **ClientFiles** folder **Note:** If ClientFiles does not exist or does not have the file listed below, download and run the Cumulative update on the server to add those files. Make sure you are on the [same version](https://help.acctivate.com/articles/15667/) as the one listed on the [Downloads](https://help.acctivate.com/downloads/) page before running the update. Support can also transfer this file over to you, if your version doesn’t match. Running the cumulative update may also resolve the issue after updating rather than running the file below manually. 3. Run the **Crystal11.exe** file 4. After re-installing the Crystal Viewer via the executable above, try the custom report in Acctivate again. 5. 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