HTTP 500 Timeout Errors Exporting Large Excel files

Question / Problem: 

When attempting to export large Excel files, HTTP 500 error is thrown with the following text in Viewer's log. What causes that and how can it be resolved?

ERROR Insight.App_Code.serviceHandler - https://127.0.0.1/WcfDataService/Htm.../ExportToExcel
System.Threading.ThreadAbortException: Thread was being aborted.

Answer / Solution: 

This issue occurs when the service handler times out before the data service can provide a response. In v5.x, the default timeout is 90 seconds. To fix this, modify the Viewer application's web.confg file as follows:

1. Backup existing copy of \Program Files\Kofax\Insight 5.4.0.0\HtmlInsightView\View\web.config
2. Edit the file and note the following section:

3. Add the following entry to the existing httpRunTime line:

1. Save the file
2. Perform an IIS reset or restart the Insight 5.4 Application Pool
3. Test

Applies to: