reporting-docs/knowledge-base/system-null-reference-exception-docker.md

title	description	type	page_title	slug	position	tags	ticketid	res_type
Docker Container Error System.NullReferenceException Object reference not set to an instance of an object	Such error might be thrown in docker for Linux	troubleshooting	Docker Container Error System.NullReferenceException Object reference not set to an instance of an object. at Telerik.Reporting.Drawing.FontExtensions.ToGdiFont(IFont font)	system- null-reference-exception-docker			1445482	kb

Environment

OS	Docker for Linux
Product Version	13.0.19.116 +
Product	Progress® Telerik® Reporting

Description

System.NullReferenceException: Object reference not set to an instance of an object when rendering report in a Docker container on Linux

Error Message

System.NullReferenceException: Object reference not set to an instance of an object.
   at Telerik.Reporting.Drawing.FontExtensions.ToGdiFont(IFont font)
   at Telerik.Reporting.Processing.GdiFontInfoCache.CreateValue(IFont font)
   at Telerik.Reporting.Processing.GdiFontCache1.GetValue(IFont font)
   . . .

Solution

Install the Microsoft true type fonts in the container and point the fonts folder in the application configuration file, for example, app.config file for desktop applications.