Error Message During Compiling: 'System.Web.MimeMappings is not a Class'
- 27 Mar 2025
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Error Message During Compiling: 'System.Web.MimeMappings is not a Class'
- Updated on 27 Mar 2025
- 1 Minute to read
- Contributors
- Print
- PDF
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This article describes a solution for the following compilation error that can appear in AX 2012:
Error
System.Web.MimeMapping is not a class.
Resolution
Lasernet needs at least .net version 4.5 in order to use the Attachment and loading of AOS/Client printers functions.
Install .net version 4.5 or later, and then compile again.