The definition of the report 'reportName.rdlc' is invalid.

Pravinkumar Birajdar

An error occured during local report processing. The definition of the report 'reportName.rdlc' is
invalid. An unexpected error occured while compiling expressions. Native compiler return valueL `-
1073741819'.

3 Replies

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Sachin Singh5y ago
Accepted answer
This error occurs when you haven't installed the correct version of the report viewer control

please install one of the below nuget package

For Winforms: https://www.nuget.org/packages/Microsoft.ReportingServices.ReportViewerControl.Winforms/140.340.80
1. PM> Install-Package Microsoft.ReportingServices.ReportViewerControl.Winforms -Version 140.340.80
For ASP.NET: https://www.nuget.org/packages/Microsoft.ReportingServices.ReportViewerControl.WebForms/140.340.80/
1. PM> Install-Package Microsoft.ReportingServices.ReportViewerControl.WebForms -Version 140.340.80
+2
Satya Karki5y ago
You may try these steps.

- Go to IIS->Application pool.
- Select your application pool on which your site is published.
- Right click and go to Advanced setting->Process model->Identity->click on side button.
- Select Built-in account-> select LocalSystem->Ok->Ok.
- Refresh Application pool.
- Finish

+2
Rijwan Ansari5y ago
Hi

check this article for similar issue.
https://randypaulo.wordpress.com/2011/07/28/asp-net-reportviewer-native-compiler-return-value-%E2%80%98bc2001-file-error/

Go to IIS
Verify on which application pool your project is running.
My Application using Network services.
So, now go to folder C:\Windows\
Right click on "Temp" Folder.
Providing permissions will fix it.

+2