error T0028: Unable to load the file '%s'. Invalid file format.

Cause

This error occurs when a binary file is included in the TDL file.

Solution

Ensure that the file for inclusion is a .txt file or .tdl file.

Example

Consider that an HTML file called abc.htm has renamed as abc.txt, and included the .txt in a .tdl file. Hence the error message error T0028: Unable to load the file '%s'. Invalid file format.